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[xtag-meeting]: Meeting this week: Feb 14 10:30am
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To: xtag-meeting@cis.upenn.edu
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Subject: [xtag-meeting]: Meeting this week: Feb 14 10:30am
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From: Anoop Sarkar <anoop@linc.cis.upenn.edu>
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Date: Mon, 11 Feb 2002 16:25:11 EST
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Sender: owner-xtag@linc.cis.upenn.edu
This week, Libin will talk about some of his recent work on
information extraction.
Time: 10:30am
Date: Feb 14 Thursday
Place: IRCS Fishbowl
Machine Learning in MUC-7 Template Relation Task
Libin Shen
Abstract:
The Template Relation (TR) task is an information extraction problem
introduced in MUC-7. In this paper, we have proposed an approach to convert
this problem into a discriminative one. As the result, the precision and
recall of our system is comparable to the best system presented in MUC-7,
while almost no extra annotation work is required. In our approach, we first
use Supertagger and Light-weighted Dependency Analyzer [Srinivas 97] to do
shallow parsing on the text. Then features are abstracted from the shallow
parsing result. We use these features as weak learners, and combine them into
the final one with a boosting classifier.