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Concept-Based Event Extraction Utilizing Rich Semantics (CONVERSE)

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
2007 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Language Computer Corporation
2435 N. Central Expressway Suite 1200 Richardson, TX 75080-
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Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2007
Title: Concept-Based Event Extraction Utilizing Rich Semantics (CONVERSE)
Agency / Branch: DOD / USAF
Contract: FA8750-07-C-0048
Award Amount: $742,660.00


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.

Principal Investigator:

John Lehmann
Principal Investigator

Business Contact:

Yolanda T. Guzman
VP - Financial & Legal
Small Business Information at Submission:

1701 North Collins Blvd. Suite 2000 Richardson, TX 75080

EIN/Tax ID: 752641308
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No