Báo cáo khoa học: "Bootstrapping Events and Relations from Text" pdf

... extraction from text. Given a set of exam- ples and an un-annotated text corpus, the BEAR system (Bootstrapping Events And Relations) will automatically learn how to recognize and understand descriptions ... (Bootstrapping Events And Relations) , which is described in this paper. 3.1 Event representation An event description can vary from very concise, newswire-style...

Ngày tải lên: 31/03/2014, 20:20

... work is similar to that of Boguraev and Ando (2005), whose research only deals with temporal links between events and time expres- sions (and does not consider relations at all). They employ a sequence ... anal- ysis and with inspiration from previous work (cf. Boguraev and Ando (2005)) we established three categories of features whose description follows. Features describing...

Ngày tải lên: 24/03/2014, 03:20

... relation extraction method to handle this weaker form of su- pervision, and present experimental results demonstrating that our approach can reliably extract relations from web documents. 1 Introduction A ... (Zelenko et al., 2003; Culotta and Sorensen, 2004; Bunescu and Mooney, 2006); however, anno- tating large corpora with examples of the relations to be extracted is expensive...

Ngày tải lên: 23/03/2014, 18:20

... extraction approach and the deep, un- derstand and generate approach (Mani, 2000). Sentence extraction methods are quite robust, but sentence extracts suffer from lack of cohesion and coherence. Methods ... or text understanding and that use the key information to produce a new text, lead to high-quality summarisation (Paice and Jones, 1993; Saggion and Lapalme, 2002) but suffer...

Ngày tải lên: 24/03/2014, 03:20

... cereals in Aisle 2 on Monday and candies on Tuesday." In the next section, we briefly describe the architecture of our generation system and the modules that handle coordination construction. ... examples taken from linguistic literature and describe how they are handled by the current algorithm. 2 Generation Architecture Traditional text generation systems contain a str...

Ngày tải lên: 31/03/2014, 04:20

... of 694 Candidate Relations. We also manually anno- tated the relations expressed in the text, identifying 94 of the Candidate Relations as valid. Our corpus contains 979 unique word types and is ... jointly learns to predict precondition relations from text and to perform high-level planning guided by those rela- tions. For a given planning task and a set of can- didate relati...

Ngày tải lên: 16/03/2014, 19:20

... is, a developer obtains 10 candidate keywords from our keyword extraction method and then they can choose proper keywords from them. Table 4 shows the results from three data sets. Table ... performances from two kinds of Naive Bayes classifiers which are learned from 500 training documents and the whole training documents respectively. Table 3. The comparison of our m...

Ngày tải lên: 20/02/2014, 16:20

... 1998), syntactic dependencies (Pantel and Ravichandran, 2004), and lexico-syntactic pat- terns (Riloff and Jones, 1999; Fleischman and Hovy, 2002; Thelen and Riloff, 2002). When research focuses ... “dress” and “person” relations, where the targeted arguments are adjectives, and the supertypes are nouns. 5 Semantic Relations So far, we have described the mechanism that learns...

Ngày tải lên: 07/03/2014, 22:20

... and k may be assigned) 6. Ambiguous Attach 2 - for the remaining am- biguous triples, split the attachment between the noun and the verb, assigning .5 to the noun and .5 to the verb. (j and ... many nouns and verbs. Nevertheless, even for Cobuild, we expect to find more concentration on, for example, idioms and closely bound argu- ments, and less attention to the adjunct...

Ngày tải lên: 08/03/2014, 07:20

... methods of Kim and Baldwin (2005) and Girju et al. (2005), and the distributional model of ´ O S ´ eaghdha and Copes- take (2008). The idea of using relational similar- ity to understand compounds ... co-occurrence probability vectors for w 1 and w 2 . Taking k jsd as a measure of word similarity and introducing parameters α and β to scale the contributions of w 1 and w 2 resp...

Ngày tải lên: 08/03/2014, 21:20