exploiting shallow linguistic information for relation extraction from biomedical literature

Ngày tải lên: 31/03/2014, 20:20

... 113–116, Columbus, Ohio, USA, June 2008. c 2008 Association for Computational Linguistics Kernels on Linguistic Structures for Answer Extraction Alessandro Moschitti and Silvia Quarteroni DISI, ... between query and answer, recent work, e.g. (Shen and Lapata, 2007) has shown that shallow semantic information in the form of predi- cate argument structures (PASs) improves the auto- matic detection ... represent shallow syn- tactic information in the learning algorithm. To experiment with our models, we built two different corpora, WEB-QA and TREC-QA by us- ing the description questions from TREC...

Ngày tải lên: 20/02/2014, 09:20

... benchmark dataset. We close with a summary and conclu- sions. 2 Kernels for Relation Extraction Relation extraction aims at learning a relation from a number of positive and negative instances in natural ... tree kernel outperforms all others by 5.7% F-Measure reaching an F-Measure of 71.2%. This result shows that both types of parse trees contain relevant information for relation extraction. The remainder ... suggesting that both types of trees contain comple- mentary information for relation extrac- tion. 1 Introduction The same semantic relation between entities in natural text can be expressed in...

Ngày tải lên: 20/02/2014, 09:20

... incorporating information gained from the textual context of the candidate term. 2 Context information for terms The idea of incorporating context information for term extraction came from that ... 'external' information derived from the context of the candidate string. It is embedded to the C-value approach for automatic term recognition (ATR), in the form of weights constructed from statisti- ... Context Information for the Extraction of Terms Katerina T. Frantzi Dept. of Computing Manchester Metropolitan University Manchester, M1 5GD, U.K. K. Frantzi@doc. mmu. ac. uk Abstract The information...

Ngày tải lên: 22/02/2014, 03:20

... A. Richardella. 2003. Kernel methods for relation extraction. Jour- nal of Machine Learning Research, pages 1083– 1106. Dependency Tree Kernels for Relation Extraction Aron Culotta University of ... In IJCAI Workshop on Information Integration on the Web. S. Miller, H. Fox, L. Ramshaw, and R. Weischedel. 2000. A novel use of statistical parsing to ex- tract information from text. In 6th Applied ... semantic la- bels denoting entity and relation types. Whereas Miller et al. (2000) use a generative model to pro- duce parse information as well as relation informa- tion, we hypothesize that a...

Ngày tải lên: 17/03/2014, 06:20

... Knowledge- based weak supervision for information extraction of overlapping relations. In Proceedings of the 49th An- nual Meeting of the Association for Computational Linguistics: Human Language Technologies ... dictionar- ies for information extraction by multi-level bootstrap- ping. In AAAI/IAAI, pages 474–479. Chang Wang, James Fan, Aditya Kalyanpur, and David Gondek. 2011. Relation extraction with relation topics. ... patterns for the relation. 6 We averaged the evaluation values in terms of macro average over relations before averaging over the data splits. 6 Patterns that ambiguously express the relation, for...

Ngày tải lên: 23/03/2014, 14:20

... 2008. Self- supervised relation extraction from the web. Knowl- edge and Information Systems, 17(1):17–33. Yusuke Shinyama and Satoshi Sekine. 2006. Preemp- tive information extraction using unrestricted ... to a small number of relation instances and corpora of less than a mil- lion words. Many early algorithms for relation extraction used little or no syntactic information. For ex- ample, the DIPRE ... extract evidence for a relation from many different documents, and from any genre. 3 Freebase Following the literature, we use the term ‘rela- tion’ to refer to an ordered, binary relation be- tween...

Ngày tải lên: 23/03/2014, 16:21

Ngày tải lên: 23/03/2014, 18:20

Ngày tải lên: 30/03/2014, 17:20

Ngày tải lên: 31/03/2014, 06:20

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Ngày tải lên: 31/03/2014, 20:20

Ngày tải lên: 20/06/2014, 20:20

Ngày tải lên: 21/06/2014, 17:20

... the field labels that are interesting for the domain 227 Proceedings of EACL '99 The Development of Lexical Resources for Information Extraction from Text Combining WordNet and Dewey ... system has been limited for two main reasons. First the in- formation associated to each term is often not de- tailed enough for describing the relations neces- sary for a IE lexicon; secondly ... Lexical Resources Lexical information in IE can be divided into three sources of information (Kilgarriff, 1997): • an ontology, i.e. the templates to be filled; • the foreground lexicon (FL),...

Ngày tải lên: 08/03/2014, 21:20

... performance for English- Latvian. 3 Conclusions and Related Information This demonstration paper describes the ACCURAT toolkit containing tools for multi-level alignment and information extraction ... Association for Computational Linguistics, pages 91–96, Jeju, Republic of Korea, 8-14 July 2012. c 2012 Association for Computational Linguistics ACCURAT Toolkit for Multi-Level Alignment and Information ... sentence generation from comparable corpora for improved SMT. Machine Translation, 25(4): 341- 375. ACCURAT D2.6 2011. Toolkit for multi-level alignment and information extraction from comparable...

Ngày tải lên: 16/03/2014, 20:20

... “deep” linguistic technology and re- dundant Web information for Information Extraction tasks. • Our experimental results reveal that relations are extractable with good precision using linguistic ... on the Web. Therefore, we do not parse informa- tion from the Web corpus, but from well written texts. Particularly, we specifically examine unsu- pervised relation extraction from existing texts ... surface patterns from the Web corpus. Surface patterns from redundancy Web information are expected to address the data sparseness problem. Wikipedia is currently widely used information extraction...

Ngày tải lên: 23/03/2014, 16:21

Ngày tải lên: 23/03/2014, 18:20

Ngày tải lên: 05/09/2013, 09:08

... Computational Linguistics, pages 776–783, Prague, Czech Republic, June 2007. c 2007 Association for Computational Linguistics Exploiting Syntactic and Shallow Semantic Kernels for Question/Answer ... impact of syntactic and shallow semantic information in automatic classifi- cation of questions and answers and answer re-ranking. We define (a) new tree struc- tures based on shallow semantics encoded in ... syntactic information helps tasks such as question/answer classifi- cation and that shallow semantics gives re- markable contribution when a reliable set of PASs can be extracted, e.g. from answers. 1...

Ngày tải lên: 20/02/2014, 12:20