automatically harvesting and ontologizing semantic relations

... the next step and explore two algorithms for ontologizing binary semantic relations into WordNet and we present empirical results on the task of attaching part-of and causa- tion relations. Formally, ... verb relations. These relations, such as (x, EXPAND, y) are first automatically learnt from a corpus. The semantic classes of x and y are then inferred using concep- tual density (Agirre and ... ontologize semantic resources without fully disambiguating text. 3 Ontologizing Semantic Relations Given an instance (x, r, y) of a binary relation r between terms x and y, the ontologizing...

Ngày tải lên: 20/02/2014, 12:20

... domain-specific textbook and on a larger corpus of general news, and have extracted sev- eral standard and specific semantic relations: is- a, part-of, succession, reaction, and production. Espresso ... In Proceedings of SemaNet’ 02: Building and Using Semantic Networks, Taipei, Taiwan. Pantel, P. and Ravichandran, D. 2004. Automatically labeling semantic classes. In Proceedings of HLT/NAACL-04. ... al. 2004), is-a (Ravi- chandran and Hovy 2002), part-of (Girju et al. 2006), and other relations. The following desiderata outline the properties of an ideal relation harvesting algorithm: •...

Ngày tải lên: 08/03/2014, 02:21

... 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 from one seed and ... #iter X and Y work for Z Charlie 2949 3396 20 X and Y fly to Z EasyJet 772 1176 19 X and Y go to Z Rita 18406 27721 13 X and Y work in Z John 4142 4918 13 X and Y work on Z Mary 4126 5186 7 X and...

Ngày tải lên: 07/03/2014, 22:20

... heuristic draws on semantic rela- tions extracted from a Webster's dictionary and the semantic thesaurus WordNet. For a given word, all applicable heuristics are tried, and those senses ... use semantic rela- tions (like A-KIND-OF) from the dictionary and WordNet to match queries to text. Since semantic rela- tions are attached to particular word senses in the dictio- nary and ... Pedersen, and Penelope Sibun. 1992. "A Practical Part-of-Speech Tagger," in Proceedings of the Third Conference on Applied NLP. 7. Dolan, William B., Lucy Vanderwende, and Richard-...

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 ... reasoning, and he applies his PairClass algorithm to a number of problems including SAT verbal analogy tests, synonym/antonym classification and distinction between semantically similar and semantically ... frequently holds between bears and forests. If the contexts in which fish and reef co-occur are similar to those found for bear and forest, this is evidence that the same semantic relation tends to hold...

Ngày tải lên: 08/03/2014, 21:20

... patient care and organization. This work was supported, in part, by grant of Zhejiang Science and Technology Agency (2008C03002-1) and Zhejiang Major Medical and Health Science and Technology ... Methods: A total of 86 obese children and adolescents and 22 healthy children and adoles- cents with normal weight were enrolled. Moreover, 23 of 86 obese children and adolescents were diagnosed with ... WC, SBP and TG, and lower HDL-C than these of obese group. There was no sta- tistical difference in the age and sex among three groups (p = 0.400, 0.672), as shown in table 1. The relationship...

Ngày tải lên: 25/10/2012, 11:40

Ngày tải lên: 03/04/2013, 20:55

... classifi- cation of questions and answers and answer re-ranking. We define (a) new tree struc- tures based on shallow semantics encoded in Predicate Argument Structures (PASs) and (b) new kernel functions ... machine learning techniques, e.g. SNoW (Li and Roth, 2005), where questions are encoded us- ing various lexical, syntactic and semantic features. The retrieval and answer extraction phases consist ... the BOW and PT features on answer classification Figure 5: Impact of the PAS and PASN features combined with the BOW and PT features on answer classification Figure 6: Comparison between PAS and PASN when...

Ngày tải lên: 20/02/2014, 12:20

... explanatory variables in model (4) and (5). So include, H i•. OG , f i• (S) and X i• as extra regressors in (4) and (5). The random effects of the resulting equation (4) (and (5)) includes the term ... separate analyses and that it therefore will add to our understanding of the reproting mechanisms. In the empirical analyses we will take f 1 and g 1 as a quadratic function and f 2 and g 2 as ... X 2 , ε 2 ; ω 2 ) (1b) The variables ε 1 and ε 1 are random disturbances, f 1 describes the relationship between true health and its instruments and f 2 represents reporting behaviour. Those...

Ngày tải lên: 05/03/2014, 21:20

... Compositional Semantic Representations and Lexical Semantic Resources: Towards Accurate Deep Semantic Parsing Sergio Roa†‡, Valia Kordoni† and Yi Zhang† Dept. of Computational Linguistics, Saarland University, ... representations and lexical semantic resources. A probabilistic model comprising Minimal Recursion Semantics (MRS) struc- tures and lexicalist oriented semantic features is acquired. Lexical semantic ... available from shal- low semantic parsers (e.g., modality and negation, quantifiers and scopes, etc.). To this effect, var- ious semantic representations have been proposed and used in different...

Ngày tải lên: 08/03/2014, 01:20

... over both 17 semantic relations (without EQUATIVE and TIME) and the full 19 semantic relations, due to the low frequency and lack of verb-based constructional contexts for EQUATIVE and TIME, as ... corpus type (Vanderwende, 1994; Barker and Szpakowicz, 1998; Rosario and Marti, 2001; Moldovan et al., 2004). In this paper, we use the set of 20 semantic relations defined by Barker and Szpakowicz ... Linguistics Interpreting Semantic Relations in Noun Compounds via Verb Semantics Su Nam Kim † and Timothy Baldwin †‡ † Computer Science and Software Engineering University of Melbourne, Victoria 3010 Australia and ‡...

Ngày tải lên: 08/03/2014, 02:21

... and assessing its contents. For instance, for LKBs, in addition to information on words and semantic relations, it is important that these interfaces provide usage ex- amples where semantic relations ... into mean- ing, and listing semantic properties like word senses or relationships between senses. So, a list of relations among words can con- flate a number of highly specialized and obsolete words ... 93,612 nouns, 38,409 verbs, 33,497 adjectives and 3,867 adverbs, in a total of 722,589 triples, and it can browse through the following types of semantic relations: synonymy, hyper- nymy, part-of,...

Ngày tải lên: 08/03/2014, 21:20

... a brand is favorable and the prior giver-recipient relationship is strong, then the gift recipient’s post-brand attitude becomes more favorable (H1.1); and the post giver- recipient relationship ... toward a brand is neutral and the giver-recipient relationship is strong, then the gift recipient’s post-brand attitude becomes more favorable (H2.1); and the post giver- recipient relationship ... toward a brand is unfarorable and the prior giver-recipient relationship is strong, then the recipient’s post-brand attitudes becomes more favorable (H3.1); and the post giver- recipient relationship...

Ngày tải lên: 14/03/2014, 14:20

... Pressure, 94 Relationship of Seed Banks to Propagule Pressure, 95 Disturbance, 95 Disturbance and Land Use, 96 Relationship of Disturbance and Succession, 97 Relationship of Stress and Disturbance, ... because hoes and other “grubbing” 20 WEEDS AND INVASIVE PLANTS Weeds in Rangelands, 26 Original Vegetation and Early Land Use History of Great Basin, 28 Introduction of Cheatgrass and Fire, 28 Invasive ... infestation to a more pristine and desirable state (Briske et al. 2003, Sheley and Krueger- Mangold 2003). On the other hand, and from the standpoint of volume of herbage produced and extent of area covered,...

Ngày tải lên: 16/03/2014, 04:20

... ex- traction of semantic relations has not been hitherto recognized. We introduce the prob- lem of comma resolution, defined as under- standing the role of commas and extracting the relations they ... be used to extract relations. We have manually annotated a corpus identifying comma structures and re- lations they entail and experimented with both gold standard parses and parses created by ... trained using the gold standard trees and then tested on gold standard parse trees (Gold- Gold), and text annotated using a state-of-the-art sta- tistical parser (Charniak and Johnson, 2005) (Gold- Charniak),...

Ngày tải lên: 17/03/2014, 02:20

... syntactic, and word- based features), and classification. In this section, we describe the underlying idea of contextual features and how contextual features are used for detecting semantic relations. 2.1 ... Japanese newspapers and weblogs, whose semantic relations between person and location had been annotated by humans for the experiments 4 . There were 5110 pairs with seman- tic relations out of ... Type (A), Type (B), and (A)+(B). We also plotted recall- precision curves 5 , altering threshold parameters, as shown in Figure 3. The comparison between STR and STR-CT and between STR and STR-CS in...

Ngày tải lên: 17/03/2014, 04:20

Ngày tải lên: 17/03/2014, 06:20

Ngày tải lên: 17/03/2014, 07:20

Ngày tải lên: 17/03/2014, 08:20

Ngày tải lên: 22/03/2014, 17:20