Concept-Based Event Extraction Utilizing Rich Semantics (CONVERSE)

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8750-07-C-0048
Agency Tracking Number: F061-060-2594
Amount: $742,660.00
Phase: Phase II
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: AF06-060
Solicitation Number: 2006.1
Small Business Information
1701 North Collins Blvd., Suite 2000, Richardson, TX, 75080
DUNS: 127802234
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John Lehmann
 Principal Investigator
 (972) 231-0052
Business Contact
 Yolanda Guzman
Title: VP - Financial & Legal
Phone: (972) 231-0052
Research Institution
This effort extends a novel approach to concept-based event extraction that leverages a rich substrate of semantic and conceptual knowledge in order to extract all of the essential information associated with events in text. In this work, we combine semantic information from a number of state-of-the-art text processing systems – including (1) word sense disambiguation systems, (2) semantic parsers (based on PropBank, NomBank, and FrameNet annotations), (3) within-document and (4) cross-document coreference resolution systems, (5) named entity recognition systems, and (6) discourse parsers -- in order to produce robust conceptual representations of events in any domain. These forms of knowledge are then used in conjunction with an active learning-based framework for open domain event extraction which can be rapidly customized to meet the particular information needs of a user. We plan to extend our Phase I work by incorporating new (1) statistical models for estimating the correctness of extracted information, (2) kernel-based methods for extracting the essential relations associated with event types, (3) unsupervised methods for named entity recognition, (4) inference-based methods for recognizing coherence relations, and (5) event coreference and event merging techniques for performing inter-sentential event extraction.

* Information listed above is at the time of submission. *

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