Báo cáo khoa học: "Dependency Tree Kernels for Relation Extraction" pot

... a cat PP IN A subtree Figure 1: A syntactic parse tree. We define as a subtree (ST) any node of a tree along with all its descendants. For example, the line in Figure 1 circles the subtree rooted in ... generate. For such purpose, the fragment types need to be described. We consider two important characterizations: the subtrees (STs) and the sub- set trees (SSTs). 2.1 Subtrees and Sub...

Ngày tải lên: 08/03/2014, 21:20

... Association for Computational Linguistics: Proceedings of the Conference, Association for Computational Linguistics, Morristown, NJ, pp. 17-24. 271 A COMPUTATIONAL MECHANISM FOR PRONOMINAL ... maps over every node in a parse tree in a left-to-right, depth first manner. Forward and backwards coreference, and disjoint reference are assigned during this tree walk. A semantic...

Ngày tải lên: 21/02/2014, 20:20

... 1996), 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 ... product. Since context carries information about terms it should be involved in the procedure for their ex- traction. We incorporate context information in the form of weights construc...

Ngày tải lên: 22/02/2014, 03:20

... to build in- formation based services around SMS technology. Today, a majority of SMS based information ser- vices require users to type specific codes to re- trieve information. For example to ... recently allowed users to formulate queries in natural language using SMS. For example, many contact centers now allow cus- tomers to “text” their complaints and requests for information over...

Ngày tải lên: 08/03/2014, 00:20

... by the informed human reader). Hand-developed annotation schemes used in treebanks are often described informally in guidebooks for annotators, leaving considerable room for variation; for example, ... eliminating the need for the intermediary concrete AML format. However, especially for existing formats, it is typically more straightforward to perform the two-step process. • type :...

Ngày tải lên: 08/03/2014, 05:20

... world changes. For example, Diekema et al., in a presentation at the 1998 TREC-7 conference (Voorhees and Har- man, 1998), observed that the performance of their cross-language information retrieval ... (Dunning, 1994). Although this does introduce a need for language-specific training data for the two languages under consideration, it is a very mild form of language dependence:...

Ngày tải lên: 08/03/2014, 06:20

... Moscow. SRL provides the semantic relationships that constituents have with predicates, thus allowing us to include document-level event descriptive in- formation into the relations holding between re- ferring ... performance. Table 6 shows the per- formance variations obtained by leaving out each feature in turn. Again, it can be seen that remov- ing both I and J SEMROLE induces a relatively...

Ngày tải lên: 08/03/2014, 21:20

... were interested in information that would be re- levant to their daily lives. While for some ge- nres, human editors can prepare texts for these users, this is not practical for news sources that ... assessment for other groups of users. Acknowledgements We thank the Weekly Reader Corporation for making its corpus available for our research. We are grateful to Martin Jansche...

Ngày tải lên: 08/03/2014, 21:20

... Greece, 2 April 2009. c 2009 Association for Computational Linguistics Structural Correspondence Learning for Parse Disambiguation Barbara Plank Alfa-informatica University of Groningen, The Netherlands b.plank@rug.nl Abstract The ... need for domain adaptation arises in many NLP tasks: Part-of-Speech tagging, Sentiment Analysis, Semantic Role Labeling or Statistical Parsing, to name b...

Ngày tải lên: 08/03/2014, 21:20

... work is, therefore, to investigate the quality of text segmenta- tion that is possible given such a surface form. *I would like to thank Chris Mellish and the anony- mous referees for their helpful ... 1). Two of the analysis modules perform a certain amount of island-driven parsing (one extracts time-related infor- mation, and the other location-related information), and the third...

Ngày tải lên: 08/03/2014, 07:20