extraction of entailed semantic relations

Ngày tải lên: 17/03/2014, 02:20

... the ar- guments and the supertypes of a diverse set of semantic relations from the Web. We evaluate the performance of our algo- rithm on multiple semantic relations ex- pressed using “verb”, ... selectional restrictions of a large class of semantic relations. The principal contribution of the paper is to demonstrate that this kind of pat- tern can be applied to almost any kind of se- mantic relation, ... “dress” relations. Although both relations differ in terms of the total number of it- erations and harvested items, the overall behavior of the learning curves is similar. Learning starts of very...

Ngày tải lên: 07/03/2014, 22:20

Ngày tải lên: 23/03/2014, 14:20

Ngày tải lên: 23/03/2014, 17:20

Ngày tải lên: 30/03/2014, 21:20

Ngày tải lên: 05/09/2013, 09:08

... part either of rules or of the processes of rule creation. 22 When Franck discussed rule creation he did so using modified versions of Hart’s concepts of secondary rules and rules of recognition. 23 According ... of international law, as embodied in the Charter and in decisions of the International Court, to regulate the use of force and the assertions of certain most powerful States, and of certain of ... has changed profoundly in recent years, not only as a result of the end of the Cold War, the disintegration of the Soviet Union and the demise of most command economies. The earlier process of decolonisation,...

Ngày tải lên: 19/02/2014, 06:20

... values of r in the “product vs. movie” task. Observe that for sentiment word extraction, the results of the proposed methods are not sensitive to the values of r. While for the topic word extraction, ... study the effect of different parameter settings. There are several parameters in the framework: the number of generated seeds r, the number of new candidates k 2 and the number of selections k ... and Ryan McDonald. 2008. A joint model of text and aspect ratings for sentiment summarization. In Proceedings of the 46th Annual Meeting of the As- sociation of Computational Linguistics: Human...

Ngày tải lên: 19/02/2014, 19:20

... children (starting from the root of the subtree) to the rule pattern subtree. Nodes of type *scope* and * match any number of nodes, similar to the semantics of Regex Kleene star (*). 5 Results As ... neighboring identical siblings of type *scope* or * are replaced by a single node of the corresponding type. Figure 3 shows an example of this transformation. (a) The children of nodes JJ/NN/NN are pruned ... Statistics of the BioScope corpus. The 2nd and 3d columns show the total number of cues within the datasets; the 4th and 5th columns show the percentage of negated and spec- ulative sentences. 70% of...

Ngày tải lên: 20/02/2014, 04:20

... Extraction of Japanese Named Entity 2.1 Task of the IREX Workshop The task of NE extraction of the IREX workshop (Sekine and Eriguchi, 2000) is to recognize eight NE types in Table 1. The organizer of ... features of original morphemes and fea- tures of similar morphemes. The experiments of extracting Japanese NEs from IREX corpus and NHK corpus show the effectiveness of the proposed method. 2 Extraction ... 2003; Nakano and Hirai, 2004) formalized the task of extracting NEs as a chunking problem of a sequence of characters instead of a sequence of morphemes. In this paper, we keep the naive formal- ization,...

Ngày tải lên: 20/02/2014, 09:20

... is-a (Ravi- chandran and Hovy 2002), part -of (Girju et al. 2003), and other relations. The output of most of these systems is flat lists of lexical semantic knowledge such as “Italy is-a country” ... ontologizing binary semantic relations into WordNet and we present empirical results on the task of attaching part -of and causa- tion relations. Formally, given an instance (x, r, y) of a binary relation ... all instantiation of x and y in the corpus. Semantic classes represent possible common generalizations of the verb ar- guments. At the end of the process, a set of syn- tactic -semantic patterns...

Ngày tải lên: 20/02/2014, 12:20

... and clustering of similar words. In Proceedings of COLING-ACL. George A. Miller, Claudia Leacock, Randee Tengi, and Ross T. Bunker. 1993. A semantic concordance. In Proceedings of HLT. Dan Moldovan ... 2007. Yago: A core of semantic knowl- edge - unifying wordnet and wikipedia. In Proceed- ings of WWW. Idan Szpektor, Eyal Shnarch, and Ido Dagan. 2007. Instance-based evaluation of entailment rule ... Proceedings of ACL. Idan Szpektor, Ido Dagan, Roy Bar-Haim, and Jacob Goldberger. 2008. Contextual preferences. In Pro- ceedings of ACL. Ellen M. Voorhees. 1994. Query expansion using lexical -semantic relations. ...

Ngày tải lên: 22/02/2014, 02:20

... sum of the context weights for a, N the size of the corpus in terms of number of words. 3 Future work Our future work involves 1. The investigation of the context used for the evaluation of ... University of Manchester Institute of Science and Technol- ogy. Didier Bourigault. 1992. Surface Grammatical Analysis for the Extraction of Terminological Noun Phrases. In Proceedings of the ... ratio for the extraction of two-word English terms. (Frantzi and Ananiadou, 1996), besides the frequency of occurrence, also consider the frequency of the candidate string as a part of longer...

Ngày tải lên: 22/02/2014, 03:20

... recognition of semantically equivalent noun phrases of the kind needed for the construction of classif- ication schedules is also exceedingly difficult. For practical purposes, the use of term ... to a recognition of noun phrases of the type normally included in back -of- the-book indexes, and an identification of related terms included in a preconstructed thesaurus of quasi-synonyms. ... uncertain nature of the relations between terms in the language. When a relaxed interpretation of Boolean logic is used, the correspondence with the fuzzy nature of linguistic relations is much...

Ngày tải lên: 22/02/2014, 09:20

... Journal of Financial Economics 25: 99-122. 24 driven loans. Moreover, when we group these four types of loans together, only 26.0% of borrowers with two or more of any of these types of loans ... conjecture that our finding of a significant effect of relationship lending on loan prices differs from that of Petersen and Rajan (1993,1994) primarily because of their inclusion of "transaction-driven" ... evidence of a lesser dependence on trade credit by firms with longer banking relationships, supporting the value of relationship lending. Petersen and Rajan's failure to find evidence of relationship...

Ngày tải lên: 06/03/2014, 08:20

... the virtue of engagement. So China can dictate the terms of the relationship, turning it on and off as it pleases. 37 Economic imbalances Nowhere is the failure of the EU’s policy of unconditional ... power of the EU while underestimating China’s ability to use engagement with Europe to its own ends. The EU’s official policy towards China is woefully out of sync with the reality of the relationship. The ... Foreign Relations does not take collective positions. This paper, like all publications of the European Council on Foreign Relations, represents only the views of its authors. A POWER AUDIT OF...

Ngày tải lên: 06/03/2014, 23:20

... preci- sion but often very low recall (e.g., “X consists of Y” for part -of relations) . In this section, we de- scribe the overall architecture of Espresso, pro- pose a principled measure of reliability, ... of Table 2, “X in the Y” for the part -of rela- tion of Table 4, “X in Y” for the part -of relation of Table 5, and “X and Y” for the reaction rela- tion of Table 7. Figure 1 illustrates the results. ... small set of instances. Espresso is designed to extract various seman- tic relations exemplified by a given small set of seed instances. We consider the standard is-a and part -of relations...

Ngày tải lên: 08/03/2014, 02:21

... forms of se- mantic relations to decide the semantic relation for NCs. 3 Semantic Relations in Compound Nouns While there has been wide recognition of the need for a system of semantic relations ... relation forms. The set of seed verbs contains verbs representa- tive of each semantic relation form. We chose two sets of seed verbs of size 57 and 84, to examine how the coverage of actual verbs by ... 2. Note that the test data set is the same for both sets of semantic relations, but that the training data in the case of 17 semantic relations will not con- tain any instances for the EQUATIVE...

Ngày tải lên: 08/03/2014, 02:21

... words with a cutoff of N=10. The resulting n-gram set had a maximum recall of 2,610 phrasal terms from the WordNet gold standard, and found the best figure of merit for any of the association ... occur at least 50 times; in short, the strategy of cutting off the data at a threshold sacrifices a large percent of total recall. Thus one of the issues that needs to be addressed is the ... that the selection of component terms is statistically independent. But of course the possibilities for combinations of words are anything but random and independent. Use of linguistic filters...

Ngày tải lên: 08/03/2014, 04:22

... WordNet encodes a wealth of semantic information that is easily mined. Seven types of semantic relations span concepts, enabling the retrieval of synonyms and other semantically related terms. ... IS-PART of vol- cano, and moreover it is a part coming from the inside; and (c) fragments of lava have all the prop- erties of lava, the following question semantic The Role of Lexico -Semantic ... are not members of any WordNet synsets containing the original keyword; and (b) have a chain of WordNet relations or bigram relations that connect it to the original keyword. These relations can...

Ngày tải lên: 08/03/2014, 05:20