Document (#37089)

Author

Ofoghi, B.
Yearwood, J.
Ma, L.

Title

¬The impact of frame semantic annotation levels, frame-alignment techniques, and fusion methods on factoid answer processing

Source

Journal of the American Society for Information Science and Technology. 60(2009) no.2, S.247-263

Year

2009

Abstract

The impact of frame semantic enrichment of texts on the task of factoid question answering (QA) is studied in this paper. In particular, we consider different techniques for answer processing with frame semantics: the level of semantic class identification and role assignment to texts, and the fusion of frame semantic-based answer-processing approaches with other methods used in the Text REtrieval Conference (TREC). The impact of each of these aspects on the overall performance of a QA system is analyzed in this paper. The TREC 2004 and TREC 2006 factoid question sets were used for the experiments. These demonstrate that the exploitation of encapsulated frame semantics in FrameNet in a shallow semantic parsing process can enhance answer-processing performance in factoid QA systems. This improvement is dependent on the level of semantic annotation, the frame semantic alignment method, and the method of fusing frame semantic-based answer-processing models with other existing models. A more comprehensively annotated environment with all different part-of-speech target predicates provides a higher chance of correct factoid answer retrieval where semantic alignment is based on both semantic classes and a relaxed set of semantic roles for answer span identification. Our experiments on fusion techniques of frame semantic-based and entity-based answer-processing models show that merging answer lists with respect to their scores and redundancy by exploiting a fusion function leads to a more effective overall factoid QA system compared to the use of individual models.

Similar documents (content)

1. Saint-Dizier, P.; Moens, M.-F.: Knowledge and reasoning for question answering : research perspectives (2011) 0.33

   0.326616 = sum of:
     0.326616 = product of:
       1.1664857 = sum of:
         0.07878171 = weight(abstract_txt:question in 2746) [ClassicSimilarity], result of:
           0.07878171 = score(doc=2746,freq=5.0), product of:
             0.07216467 = queryWeight, product of:
               1.1246673 = boost
               5.207682 = idf(docFreq=657, maxDocs=44218)
               0.012321288 = queryNorm
             1.0916936 = fieldWeight in 2746, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.207682 = idf(docFreq=657, maxDocs=44218)
               0.09375 = fieldNorm(doc=2746)
         0.013776632 = weight(abstract_txt:with in 2746) [ClassicSimilarity], result of:
           0.013776632 = score(doc=2746,freq=2.0), product of:
             0.04156838 = queryWeight, product of:
               1.3496256 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.012321288 = queryNorm
             0.33142096 = fieldWeight in 2746, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.09375 = fieldNorm(doc=2746)
         0.04918861 = weight(abstract_txt:techniques in 2746) [ClassicSimilarity], result of:
           0.04918861 = score(doc=2746,freq=2.0), product of:
             0.081902 = queryWeight, product of:
               1.4674206 = boost
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.012321288 = queryNorm
             0.6005789 = fieldWeight in 2746, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.09375 = fieldNorm(doc=2746)
         0.08977538 = weight(abstract_txt:processing in 2746) [ClassicSimilarity], result of:
           0.08977538 = score(doc=2746,freq=1.0), product of:
             0.1941674 = queryWeight, product of:
               3.1952918 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.012321288 = queryNorm
             0.46236074 = fieldWeight in 2746, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.09375 = fieldNorm(doc=2746)
         0.23185128 = weight(abstract_txt:fusion in 2746) [ClassicSimilarity], result of:
           0.23185128 = score(doc=2746,freq=1.0), product of:
             0.3192866 = queryWeight, product of:
               3.3455467 = boost
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.012321288 = queryNorm
             0.7261541 = fieldWeight in 2746, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.09375 = fieldNorm(doc=2746)
         0.32873857 = weight(abstract_txt:answer in 2746) [ClassicSimilarity], result of:
           0.32873857 = score(doc=2746,freq=2.0), product of:
             0.41910774 = queryWeight, product of:
               5.7495103 = boost
               5.916144 = idf(docFreq=323, maxDocs=44218)
               0.012321288 = queryNorm
             0.7843772 = fieldWeight in 2746, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.916144 = idf(docFreq=323, maxDocs=44218)
               0.09375 = fieldNorm(doc=2746)
         0.3743735 = weight(abstract_txt:frame in 2746) [ClassicSimilarity], result of:
           0.3743735 = score(doc=2746,freq=1.0), product of:
             0.5758446 = queryWeight, product of:
               6.739391 = boost
               6.9347134 = idf(docFreq=116, maxDocs=44218)
               0.012321288 = queryNorm
             0.6501294 = fieldWeight in 2746, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.9347134 = idf(docFreq=116, maxDocs=44218)
               0.09375 = fieldNorm(doc=2746)
       0.28 = coord(7/25)
   

2. Abacha, A.B.; Zweigenbaum, P.: MEANS: A medical question-answering system combining NLP techniques and semantic Web technologies (2015) 0.28

   0.28136984 = sum of:
     0.28136984 = product of:
       0.7034246 = sum of:
         0.029187836 = weight(abstract_txt:performance in 2677) [ClassicSimilarity], result of:
           0.029187836 = score(doc=2677,freq=2.0), product of:
             0.05705274 = queryWeight, product of:
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.012321288 = queryNorm
             0.51159394 = fieldWeight in 2677, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.041521605 = weight(abstract_txt:question in 2677) [ClassicSimilarity], result of:
           0.041521605 = score(doc=2677,freq=2.0), product of:
             0.07216467 = queryWeight, product of:
               1.1246673 = boost
               5.207682 = idf(docFreq=657, maxDocs=44218)
               0.012321288 = queryNorm
             0.57537305 = fieldWeight in 2677, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.207682 = idf(docFreq=657, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.0314854 = weight(abstract_txt:experiments in 2677) [ClassicSimilarity], result of:
           0.0314854 = score(doc=2677,freq=1.0), product of:
             0.07560631 = queryWeight, product of:
               1.1511735 = boost
               5.3304167 = idf(docFreq=581, maxDocs=44218)
               0.012321288 = queryNorm
             0.41643882 = fieldWeight in 2677, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3304167 = idf(docFreq=581, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.048336487 = weight(abstract_txt:overall in 2677) [ClassicSimilarity], result of:
           0.048336487 = score(doc=2677,freq=2.0), product of:
             0.07985926 = queryWeight, product of:
               1.183108 = boost
               5.478287 = idf(docFreq=501, maxDocs=44218)
               0.012321288 = queryNorm
             0.6052709 = fieldWeight in 2677, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.478287 = idf(docFreq=501, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.008117958 = weight(abstract_txt:with in 2677) [ClassicSimilarity], result of:
           0.008117958 = score(doc=2677,freq=1.0), product of:
             0.04156838 = queryWeight, product of:
               1.3496256 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.012321288 = queryNorm
             0.19529167 = fieldWeight in 2677, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.028984666 = weight(abstract_txt:techniques in 2677) [ClassicSimilarity], result of:
           0.028984666 = score(doc=2677,freq=1.0), product of:
             0.081902 = queryWeight, product of:
               1.4674206 = boost
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.012321288 = queryNorm
             0.3538945 = fieldWeight in 2677, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.023812562 = weight(abstract_txt:based in 2677) [ClassicSimilarity], result of:
           0.023812562 = score(doc=2677,freq=2.0), product of:
             0.06760715 = queryWeight, product of:
               1.721187 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.012321288 = queryNorm
             0.35221958 = fieldWeight in 2677, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.07481282 = weight(abstract_txt:processing in 2677) [ClassicSimilarity], result of:
           0.07481282 = score(doc=2677,freq=1.0), product of:
             0.1941674 = queryWeight, product of:
               3.1952918 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.012321288 = queryNorm
             0.38530064 = fieldWeight in 2677, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.19371106 = weight(abstract_txt:answer in 2677) [ClassicSimilarity], result of:
           0.19371106 = score(doc=2677,freq=1.0), product of:
             0.41910774 = queryWeight, product of:
               5.7495103 = boost
               5.916144 = idf(docFreq=323, maxDocs=44218)
               0.012321288 = queryNorm
             0.46219873 = fieldWeight in 2677, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.916144 = idf(docFreq=323, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
         0.22345419 = weight(abstract_txt:semantic in 2677) [ClassicSimilarity], result of:
           0.22345419 = score(doc=2677,freq=4.0), product of:
             0.3196254 = queryWeight, product of:
               5.7977304 = boost
               4.4743214 = idf(docFreq=1369, maxDocs=44218)
               0.012321288 = queryNorm
             0.6991127 = fieldWeight in 2677, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.4743214 = idf(docFreq=1369, maxDocs=44218)
               0.078125 = fieldNorm(doc=2677)
       0.4 = coord(10/25)
   

3. Fernández, M.; Cantador, I.; López, V.; Vallet, D.; Castells, P.; Motta, E.: Semantically enhanced Information Retrieval : an ontology-based approach (2011) 0.24

   0.2431206 = sum of:
     0.2431206 = product of:
       0.6078015 = sum of:
         0.014447243 = weight(abstract_txt:performance in 230) [ClassicSimilarity], result of:
           0.014447243 = score(doc=230,freq=1.0), product of:
             0.05705274 = queryWeight, product of:
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.012321288 = queryNorm
             0.2532261 = fieldWeight in 230, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.02203978 = weight(abstract_txt:experiments in 230) [ClassicSimilarity], result of:
           0.02203978 = score(doc=230,freq=1.0), product of:
             0.07560631 = queryWeight, product of:
               1.1511735 = boost
               5.3304167 = idf(docFreq=581, maxDocs=44218)
               0.012321288 = queryNorm
             0.29150715 = fieldWeight in 230, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3304167 = idf(docFreq=581, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.0056825713 = weight(abstract_txt:with in 230) [ClassicSimilarity], result of:
           0.0056825713 = score(doc=230,freq=1.0), product of:
             0.04156838 = queryWeight, product of:
               1.3496256 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.012321288 = queryNorm
             0.13670418 = fieldWeight in 230, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.020289266 = weight(abstract_txt:techniques in 230) [ClassicSimilarity], result of:
           0.020289266 = score(doc=230,freq=1.0), product of:
             0.081902 = queryWeight, product of:
               1.4674206 = boost
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.012321288 = queryNorm
             0.24772614 = fieldWeight in 230, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.028871197 = weight(abstract_txt:based in 230) [ClassicSimilarity], result of:
           0.028871197 = score(doc=230,freq=6.0), product of:
             0.06760715 = queryWeight, product of:
               1.721187 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.012321288 = queryNorm
             0.42704356 = fieldWeight in 230, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.029103799 = weight(abstract_txt:models in 230) [ClassicSimilarity], result of:
           0.029103799 = score(doc=230,freq=1.0), product of:
             0.114655875 = queryWeight, product of:
               2.0048177 = boost
               4.6415744 = idf(docFreq=1158, maxDocs=44218)
               0.012321288 = queryNorm
             0.2538361 = fieldWeight in 230, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6415744 = idf(docFreq=1158, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.09283062 = weight(abstract_txt:trec in 230) [ClassicSimilarity], result of:
           0.09283062 = score(doc=230,freq=2.0), product of:
             0.17915727 = queryWeight, product of:
               2.170324 = boost
               6.699675 = idf(docFreq=147, maxDocs=44218)
               0.012321288 = queryNorm
             0.5181516 = fieldWeight in 230, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.699675 = idf(docFreq=147, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.05236898 = weight(abstract_txt:processing in 230) [ClassicSimilarity], result of:
           0.05236898 = score(doc=230,freq=1.0), product of:
             0.1941674 = queryWeight, product of:
               3.1952918 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.012321288 = queryNorm
             0.26971045 = fieldWeight in 230, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.13524657 = weight(abstract_txt:fusion in 230) [ClassicSimilarity], result of:
           0.13524657 = score(doc=230,freq=1.0), product of:
             0.3192866 = queryWeight, product of:
               3.3455467 = boost
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.012321288 = queryNorm
             0.4235899 = fieldWeight in 230, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
         0.20692146 = weight(abstract_txt:semantic in 230) [ClassicSimilarity], result of:
           0.20692146 = score(doc=230,freq=7.0), product of:
             0.3196254 = queryWeight, product of:
               5.7977304 = boost
               4.4743214 = idf(docFreq=1369, maxDocs=44218)
               0.012321288 = queryNorm
             0.6473874 = fieldWeight in 230, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.4743214 = idf(docFreq=1369, maxDocs=44218)
               0.0546875 = fieldNorm(doc=230)
       0.4 = coord(10/25)
   

4. Green, R.: Semantic types, classes, and instantiation (2006) 0.23

   0.23244853 = sum of:
     0.23244853 = product of:
       1.1622427 = sum of:
         0.1010127 = weight(abstract_txt:framenet in 236) [ClassicSimilarity], result of:
           0.1010127 = score(doc=236,freq=1.0), product of:
             0.13053466 = queryWeight, product of:
               1.0695711 = boost
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.012321288 = queryNorm
             0.7738381 = fieldWeight in 236, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.078125 = fieldNorm(doc=236)
         0.034179058 = weight(abstract_txt:overall in 236) [ClassicSimilarity], result of:
           0.034179058 = score(doc=236,freq=1.0), product of:
             0.07985926 = queryWeight, product of:
               1.183108 = boost
               5.478287 = idf(docFreq=501, maxDocs=44218)
               0.012321288 = queryNorm
             0.42799118 = fieldWeight in 236, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.478287 = idf(docFreq=501, maxDocs=44218)
               0.078125 = fieldNorm(doc=236)
         0.008117958 = weight(abstract_txt:with in 236) [ClassicSimilarity], result of:
           0.008117958 = score(doc=236,freq=1.0), product of:
             0.04156838 = queryWeight, product of:
               1.3496256 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.012321288 = queryNorm
             0.19529167 = fieldWeight in 236, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.078125 = fieldNorm(doc=236)
         0.19351698 = weight(abstract_txt:semantic in 236) [ClassicSimilarity], result of:
           0.19351698 = score(doc=236,freq=3.0), product of:
             0.3196254 = queryWeight, product of:
               5.7977304 = boost
               4.4743214 = idf(docFreq=1369, maxDocs=44218)
               0.012321288 = queryNorm
             0.6054493 = fieldWeight in 236, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.4743214 = idf(docFreq=1369, maxDocs=44218)
               0.078125 = fieldNorm(doc=236)
         0.8254159 = weight(abstract_txt:frame in 236) [ClassicSimilarity], result of:
           0.8254159 = score(doc=236,freq=7.0), product of:
             0.5758446 = queryWeight, product of:
               6.739391 = boost
               6.9347134 = idf(docFreq=116, maxDocs=44218)
               0.012321288 = queryNorm
             1.4334005 = fieldWeight in 236, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               6.9347134 = idf(docFreq=116, maxDocs=44218)
               0.078125 = fieldNorm(doc=236)
       0.2 = coord(5/25)
   

5. Green, R.: Facet analysis and semantic frames (2017) 0.18

   0.17898743 = sum of:
     0.17898743 = product of:
       0.8949371 = sum of:
         0.036409996 = weight(abstract_txt:semantics in 3849) [ClassicSimilarity], result of:
           0.036409996 = score(doc=3849,freq=1.0), product of:
             0.09665826 = queryWeight, product of:
               1.3016111 = boost
               6.027006 = idf(docFreq=289, maxDocs=44218)
               0.012321288 = queryNorm
             0.37668788 = fieldWeight in 3849, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.027006 = idf(docFreq=289, maxDocs=44218)
               0.0625 = fieldNorm(doc=3849)
         0.014521846 = weight(abstract_txt:with in 3849) [ClassicSimilarity], result of:
           0.014521846 = score(doc=3849,freq=5.0), product of:
             0.04156838 = queryWeight, product of:
               1.3496256 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.012321288 = queryNorm
             0.34934837 = fieldWeight in 3849, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.0625 = fieldNorm(doc=3849)
         0.032792408 = weight(abstract_txt:techniques in 3849) [ClassicSimilarity], result of:
           0.032792408 = score(doc=3849,freq=2.0), product of:
             0.081902 = queryWeight, product of:
               1.4674206 = boost
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.012321288 = queryNorm
             0.40038592 = fieldWeight in 3849, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.0625 = fieldNorm(doc=3849)
         0.1998635 = weight(abstract_txt:semantic in 3849) [ClassicSimilarity], result of:
           0.1998635 = score(doc=3849,freq=5.0), product of:
             0.3196254 = queryWeight, product of:
               5.7977304 = boost
               4.4743214 = idf(docFreq=1369, maxDocs=44218)
               0.012321288 = queryNorm
             0.6253054 = fieldWeight in 3849, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.4743214 = idf(docFreq=1369, maxDocs=44218)
               0.0625 = fieldNorm(doc=3849)
         0.61134934 = weight(abstract_txt:frame in 3849) [ClassicSimilarity], result of:
           0.61134934 = score(doc=3849,freq=6.0), product of:
             0.5758446 = queryWeight, product of:
               6.739391 = boost
               6.9347134 = idf(docFreq=116, maxDocs=44218)
               0.012321288 = queryNorm
             1.0616568 = fieldWeight in 3849, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.9347134 = idf(docFreq=116, maxDocs=44218)
               0.0625 = fieldNorm(doc=3849)
       0.2 = coord(5/25)