AIC Seminar Series
Unsupervised Discovery of Narratives from Text
|Nate Chambers||Stanford University|
Notice: hosted by Eric Yeh
Date: Thursday, May 22nd 2008 at 4:00pm
Location: EJ228 (SRI E building) (Directions)
Hand-coded scripts were used in the 1970-80s as knowledge backbones that enabled inference and other NLP tasks requiring deep semantic knowledge. I'll describe a proposed unsupervised induction of similar schemata called Narrative Event Chains from raw newswire text. A narrative chain is a partially ordered set of events related by a common protagonist. I'll describe a three step process to learning narrative chains. The first uses unsupervised distributional methods to learn narrative relations between events sharing coreferring entity arguments. The second applies a temporal classifier to partially order the connected events. Finally, the third prunes and clusters self-contained chains from the space of events. Two evaluations are introduced: the narrative cloze to evaluate event relatedness, and an order coherence task to evaluate narrative order.
Please arrive at least 10 minutes early as you will need to sign in by
following instructions by the lobby phone at Building E. (or call Wilma
Lenz at 650 859 4904, or Vicenta at Lopez at 650 859 5750). SRI is
located at 333 Ravenswood Avenue in Menlo Park. Visitors may park in the
parking lots off Fourth Street. Detailed directions to SRI, as well as maps,
are available from the Visiting AIC web page.
There are two entrances to SRI International located on Ravenswood Ave.
Please check the Builing E entrance signage.
©2017 SRI International 333 Ravenswood Avenue, Menlo Park, CA 94025-3493