A Broad Range, Purposeful, Textual Inference
Technical Report,01 Oct 2012,30 Nov 2017
University of Illinois at Urbana-Champaign Urbana United States
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The objective of DARPAs DEFT program is to create capabilities for deep natural language understanding and use them to aid analysts in identifying information sources that contain new developments of interest. The goal of the Cognitive Computation Group team has been to combine Natural Language Processing NLP, Machine Learning ML, and Knowledge Representation and Reasoning KRR techniques into new technologies that support the DEFT mission. Our project, a broad range purposeful textual inference system, was built on two pillars 1 an innovative learning and inference approach emphasizing joint inference over a component-based architecture, and 2 a textual inference approach that supports relational analysis in multiple NLP tasks. The project focused on studying and developing four algorithmic components. The first was the aforementioned generic purposeful textual inference capability. The other three components were 2 a Sentence Level Extended Semantic Role Labeling component that provides a complete and coherent predicate-argument representation of sentences covering multiple predicate types 3 a Discourse Analysis component that addresses discourse phenomena including relations between events, temporal grounding of events and relations, and time lining of events and 4 a Profiling component that provides a new way of representing, aggregating, and supporting the use of knowledge about concepts and entities in NLP.
- Information Science