Events Calendar

NL Seminar-Shift-Reduce CCG Parsing with a Dependency Model

Speaker: Wenduan Xu, University of Cambridge/ USC ISI Intern

Talk Title: Shift-Reduce CCG Parsing with a Dependency Model

Series: Natural Language Seminar

Abstract: CCG is able to derive typed dependency structures, providing a useful approximation to the underlying predicate-argument relations of -who did what to whom- and dependency structures form an integral part of CCG. In this talk, I will first cover some essential background on CCG, its dependency structures and CCG parsing; I will then discuss a recent dependency model we developed for shift-reduce CCG parsing. A challenge arises in this model from the fact that the oracle needs to keep track of exponentially many gold-standard derivations, which are all hidden. And we solve this by integrating a packed parse forest with the beam-search decoder and introduce a novel technique for querying an exponentially-sized oracle on-the-fly during beam-search decoding.

Biography: Wenduan Xu is a graduate student in Cambridge advised by Stephen Clark, working on CCG parsing.

Host: Nima Pourdamghani and Kevin Knight

More Info: http://nlg.isi.edu/nl-seminar/

Location: 6th Flr Conf Rm # 689 Marina Del Rey

Audiences: Everyone Is Invited

Contact: Peter Zamar

Event Link: http://nlg.isi.edu/nl-seminar/