[PDF] Top 20 A Re examination of Dependency Path Kernels for Relation Extraction

... top-level relation types (At, Near, Part-of, Role and Social) are manually anno- tated in this ...and dependency parsing is performed using MSTParser (McDonald et ...all kernels are uniformally set ... See full document

... the dependency trees and syntactic parse trees, including the path from the first argument to the second argument, the parents of the first and second arguments of a relation in a dependency ... See full document

... the relation extraction problem as a supervised learning (classification) ...one relation from the ...and dependency relations) help the classifier to achieve better ...shortest path ... See full document

... tree kernels can be obtained, based on the definition of a tree fragment, namely subtree, sub- set tree and partial ...For dependency parse trees with no such grammatical constraints, partial trees are more ... See full document

... tion extraction between two named entities; for instance, the semantic bornIn relation be- tween a person and location ...syntactic dependency path between ...observed relation tuples ... See full document

... two kernels: a simple kernel based on edit distance (Erkan et ...performing kernels on the PPI task (Airola et ...both kernels using dependency graph and EDG on 5 ... See full document

... firstly, dependency relation paths are defined and extracted from the question and each of its candidate ...between dependency re- lations, which are estimated from a set of train- ing ... See full document

... our system publicly available (see Section 5). Table 3 shows that our system (bottom) aligns well with the state of the art. Our best sys- tem (composite kernel with polynomial expan- sion) reaches an F1 of 70.1, which ... See full document

... tree kernels is the dependency tree (DT) kernel (Culotta and Sorensen, 2004; Nguyen et ...a dependency tree (or subtree). A dependency tree encodes grammati- cal relations between words in a ... See full document

... In contrast to previous works on parsing with ker- nels (Collins and Duffy, 2002), in which the ker- nels are defined over trees and count the number of shared subtrees, our focus is on feature combi- nations. In that ... See full document

... pendency relation parsing errors, especially for long ...of dependency relations on long sentences may lead to incorrect extractions and decrease the ...that dependency trees have different ... See full document

... We have described some of the limits of current Open IE systems, which concentrate on identifying explicit relations, i.e., relations which are mediated by open class words. This strategy ignores what we describe as ... See full document

... for relation extraction (Zhou et ...shortest dependency path in the dependency graph because the words on the shortest dependency path concentrate the most relevant ... See full document

... Information Extraction on free ...paper re-examines the problem at the multi- resolution layers of phrase, clause and sen- tence using dependency and discourse rela- ...and Relation) uses ... See full document

... on relation extraction have shown experi- mentally that the use of automatically derived syn- tactic information can lead to significant improve- ments in extraction ...to dependency trees ... See full document

... In this work we propose an enhanced represen- tation for relations that combines the advantages of the above approaches. Basically, we focus on condensed semantic and syntactic information on the SDP. Compensating for ... See full document

... innovative kernels based on syntactic and semantic structures for a target relation extraction ...and dependency parse trees whereas se- mantics concerns to entity types and lex- ical ... See full document

... We have shown that using a dependency tree ker- nel for relation extraction provides a vast improve- ment over a bag-of-words kernel. While the de- pendency tree kernel appears to perform well at the ... See full document

... learning-based relation extraction in clinical text and we plan to investigate the other aspects in our future ...for relation extraction in the medical ...a relation in the knowledge ... See full document

... Similarity measures that make use of the vector- space model (Salton et al., 1975) treat words in a document as if they were independent of one an- other, which is not realistic. In fact, words relate to one another to ... See full document