[nl-uiuc] Upcoming talk at the AIIS seminar (this Thursday).

[Alexandre Klementiev]

Dear all,

The location of the talk has changed: it will take place in Siebel 3403
(next to our usual room).

Alex.

On Sat, May 17, 2008 at 3:14 PM, Alexandre Klementiev <klementi at uiuc.edu>
wrote:

> Dear faculty and students,
>
> Gabriele Antonio Musillo will give a talk (details below) at the AIIS<http://l2r.cs.uiuc.edu/%7Ecogcomp/aiis/> seminar
> this Thursday.  If you would like to meet with Gabriele personally, please
> let me know.
>
> Thank you,
> Alex
>
> Title:* **Unlexicalised Hidden Variable Models of Split Dependency
> Grammars *
> Speaker: *Gabriele Antonio Musillo, University of Geneva and MIT*
> Date: May 22, 4:00pm
> Location: Siebel 3405
>
> Abstract:
>
> This talk presents transforms of split dependency grammars into
> unlexicalised context-free grammars annotated with hidden symbols, that make
> learning and decoding algorithms for probabilistic context-free grammars
> available to projective dependency grammars. The Inside-Outside algorithm is
> used to estimate the hidden variables decorating such transforms. Our best
> unlexicalised grammar achieves an accuracy of 88% on the Penn Treebank data
> set, that represents a 50% reduction in error over previously published
> results on unlexicalised dependency parsing. Such performance shows that our
> unlexicalised models are able to capture both lexical and structural
> information that is relevant to parsing accuracy and suggests that we should
> reassess the relevance of massive lexicalisation to dependency parsing.
> Bio:
>
> Gabriele Antonio Musillo is a PhD student in Computer Science and
> Linguistics at the University of Geneva, Switzerland, under the supervision
> of Prof. Paola Merlo. His main research interests lie in statistical parsing
> of natural language and machine learning of natural language grammars. He is
> currently a visiting student at MIT/CSAIL hosted by Prof. Michael Collins.
>
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