[IR Series] : Structured Retrieval for Question Answering @ 20/07/07

[Grace Hui Yang]

Dear All,
We are pleased to announce the IR series talk on this Friday. The talk 
will be given by Matthew W. Bilotti. The talk is about "Structured 
Retrieval for Question Answering". Lunch will be provided by our sponsor 
Yahoo!.

See you there!


Time: 12:00 noon
Date: July 20 2007 (Friday)
Location: NSH 1109

Speaker: Matthew W. Bilotti
Topic: Structured Retrieval for Question Answering

Abstract:
Bag-of-words retrieval is popular among Question Answering
(QA) system developers, but it does not support constraint
checking and ranking on the linguistic and semantic
information of interest to the QA system. We present an
approach to retrieval for QA, applying structured retrieval
techniques to the types of text annotations that QA systems
use. We demonstrate that the structured approach can retrieve
more relevant results, more highly ranked, compared
with bag-of-words, on a sentence retrieval task. We also
characterize the extent to which structured retrieval effectiveness
depends on the quality of the annotations.


The paper is published in SIGIR 2007. Here is a copy of the paper : 
http://www.cs.cmu.edu/~mbilotti/pubs/Bilotti:SIGIR07.pdf

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Grace, Jaime, Jon