[PDF] Top 20 Unsupervised Event Coreference Resolution with Rich Linguistic Features

... role features, we align frame elements to predicate ar- guments by running the PropBank semantic parser on the manual annotations from FrameNet; con- versely, we also run the FrameNet parser on the manual ... See full document

... the unsupervised model in resolv- ing anaphoric mentions, it correctly resolves 42 anaphoric event mentions that are incorrectly han- dled by the unsupervised ...unique features of ... See full document

... One contribution of this paper is the exploration of strong modularity, including the result that our system beats all unsupervised systems and ap- proaches the state of the art in supervised ones. Another ... See full document

... In the first stage, a specific pass identifies the mentions referring to a person entity, using the informa- tion provided by the PoS-tagger and the NER as well as applying basic approaches for NP and elliptical pronoun ... See full document

... a rich set of annotated corpora for linguistic analysis tasks for these ...Since unsupervised methods do not require annotated data for learning a model, employing unsupervised methods has ... See full document

... appealing, unsupervised learning is very challenging, and unsupervised coreference resolution systems are still rare to this ...in unsupervised coreference resolution was ... See full document

... Chinese event extraction task, which involves identi- fying event instances that belong to one of 33 predefined event ...an event extraction system when evaluated on this ...the ... See full document

... Event coreference resolution is a challenging problem since it relies on several components of the information extraction pipeline that typically yield noisy ...an event coreference ... See full document

... Coreference resolution in general is a difficult natu- ral language processing (NLP) task and typically re- quires sophisticated inferentially-based knowledge- intensive models (Kehler, ...erence ... See full document

... using features which encode properties such as distance, syntactic environment, and so on (Soon et ...First, rich features require plen- tiful labeled data, which we do not have for corefer- ence ... See full document

... of event actions (in Winston et ...of event du- rations by Gusev et al. (2011). The lexicon of event durations ...an unsupervised ap- ... See full document

... modeling event mentions with an infinite number of features and by using a mechanism to automatically select a finite set of the most salient features for each mention in the inference ...latent ... See full document

... We have developed a coreference resolver called BABAR that uses contextual role knowledge to make coreference decisions. BABAR employs information ex- traction techniques to represent and learn role ... See full document

... According to previous work (Haghighi and Klein, 2009; Ratinov and Roth, 2012; Lee et al., 2013), antecedents are resolved by different categories of information for different mentions. For example, the Stanford system ... See full document

... We used various annotations for both English source sentences and French target sentences: PoS tagging and dependency parsing for both lan- guages, coreference resolution for English and morphological ... See full document

... The automatically generated constituent trees pro- vided in the data set contain errors and this causes the loss of many mentions. Another source of loss is the bracketing of complex NPs, where the in- ternal structure ... See full document

... additional features: cluster gender, number, semantic agreement, cluster length, cluster string similarity, and longest phrase ...pair-wise coreference decisions being made independently of the ... See full document

... our unsupervised generating proce- dure sometimes yields examples where the cor- rect answer cannot be deduced given the available information, we refer to these as unsolvable ex- ... See full document

... model. Features for the anaphoricity classi- fier include the mention type, whether the mention appears in a quotation, the text of the first word of the extent, the text of the first word after the head (if that ... See full document

... cluster event mentions that have few common fea- ...coreferent event mentions, but our system failed to de- tect this coreferent pair for at least two ...corresponding event mentions are ... See full document