A Prolog chart parser for Head-Driven Phrase Structure Grammar (HPSG) is described. The HPSG formalism has undergone significant modification since Proudian and Pollard first introduced an HPSG chart parser in 1985. This paper describes the impact of these developments on chart parsing methodology. It also presents a critical evaluation of aspects of HPSG which emerges from our implementation.

Phrase-structure and dependency parsers are used massively in the Natural Language Processing community. ZPar implements fast and accurate versions of shift-reduce dependency and phrase-structure parsing algorithms. We present ViZPar, a tool that enhances the usability of ZPar, including parameter selection and output visualization. Moreover, ViZPar allows manual feature selection which makes t...

This paper extends the base noun phrase(BNP) identification into a research on Chinese base phrase identification. After briefly introducing some basic concepts on Chinese base phrase, this paper presents a statistics based hybrid model for identifying 7 types of Chinese base phrases in view. Experiments show the efficiency of the proposed method in simplifying sentence structure. Significance ...

This paper presents the conversion of SynTagRus dependency structures into Penn Treebank style phrase structures, whose resulting data will be used to train a statistical constituency parser for Russian and create a large-scale constituency-parsed corpus. The implemented conversion includes various innovative features in order to create phrase structure trees that are closest to Penn Treebank s...

A system is described for acquiring a contextsensitive, phrase structure g rammar which is applied by a best-path, bot tom-up, deterministic parser. The grammar was based on English news stories and a high degree of success in parsing is reported. Overall, this research concludes that CSG is a computationally and conceptually tractable approach to the construction of phrase structure g rammar f...

We present an approach for deriving syntactic word clusters from parsed text, grouping words according to their unlexicalized syntactic contexts. We then explore the use of these syntactic clusters in leveraging a large corpus of trees generated by a high-accuracy parser to improve the accuracy of another parser based on a different formalism for representing a different level of sentence struc...

We investigated the processing of pronouns in Strong and Weak Crossover constructions as a means of probing the extent to which the incremental parser can use syntactic information to guide antecedent retrieval. In Experiment 1 we show that the parser accesses a displaced wh-phrase as an antecedent for a pronoun when no grammatical constraints prohibit binding, but the parser ignores the same w...

Following the works of Carletta (1996) and Artstein and Poesio (2008), there is an increasing consensus within the field that in order to properly gauge the reliability of an annotation effort, chance-corrected measures of inter-annotator agreement should be used. With this in mind, it is striking that virtually all evaluations of syntactic annotation efforts use uncorrected parser evaluation m...