| Research in Text Processing |
21 DEC 92 |
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| Authors:
Jerry R. Hobbs; SRI INTERNATIONAL MENLO PARK CA
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 | SRI's DARPA-sponsored project on text processing has consisted of a broad range of efforts, from near-term practical system implementation to advanced theoretical research. The research in this project was carried out between September 1990 and November 1992. We have distinguished two distinct text processing tasks: information extraction and text understanding. In information extraction, Only a fraction of the text is relevant; in the case of the MUC-4 terrorist reports, probably ... |
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| FASTUS: A System for Extracting Information from Natural-Language Text |
19 NOV 92 |
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| Authors:
Jerry R. Hobbs; Douglas Appelt Sr; John S. Bear; David Israel Sr; W. M. Tyson; SRI INTERNATIONAL MENLO PARK CA
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| FASTUS is a system for extracting information from free text in English, and potentially other languages as well, for entry into a database, and potentially for other applications. It works essentially as a cascaded, nondeterministic finite state automaton. There are four steps in the operation of FASTUS. In Step (1) sentences are scanned for certain trigger words to determine whether further processing should be done. In Step (2) noun groups, ... |
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| Interpretation as Abduction |
92 |
68 pages |
| Authors:
Jerry R. Hobbs; Mark Stickel; Douglas Appelt; Paul Martin; SRI INTERNATIONAL MENLO PARK CA ARTIFICIAL INTELLIGENCE CENTER
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 | Abduction is inference to the best explanation. In the TACITUS project at SRI we have developed an approach to abductive inference, called weighted abduction , that has resulted in a significant simplification of how the problem of interpreting texts is conceptualized. The interpretation of a text is the minimal explanation of why the text would be true. More precisely, to interpret a text, one must prove the logical form of ... |
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| A Unified Abductive Treatment of the Intentional and Informational Aspects of Discourse Interpretation: A Preliminary Report |
92 |
16 pages |
| Authors:
Jerry R. Hobbs; SRI INTERNATIONAL MENLO PARK CA ARTIFICIAL INTELLIGENCE CENTER
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| The problem of interpreting discourse has been subsumed under the general problem faced by intelligent agents of interpreting the situation they are in by explaining the observable facts. The possibility of interpreting an event as the saying by an intelligent agent of a meaningful stretch of discourse is given by an axiom-axiom (18). The ways in which a stretch of discourse can be analyzed into its parts are given by ... |
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| Metaphor and Abduction |
25 AUG 91 |
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| Authors:
Jerry R. Hobbs; SRI INTERNATIONAL MENLO PARK CA
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| In this paper a recent approach to inference in text understanding based on abduction is applied to the problem of metaphor interpretation. The fundamental ideas in the interpretation as abduction approach are outlined. A succinct characterization of interpretation is given, along with a brief example and a description of the principal features of a weighted abduction scheme that is used. This approach is shown to lead to an elegant integration ... |
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| Robust Processing of Real-World Natural-Language Texts |
91 |
24 pages |
| Authors:
Jerry R. Hobbs; Douglas E. Appelt; John Bear; Mabry Tyson; David Magerman; SRI INTERNATIONAL MENLO PARK CA
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| It is often assumed that when natural language processing meets the real world, the ideal of aiming for complete and correct interpretations has to be abandoned. However, our experience with TACITUS, especially in the MUC-3 evaluation, has shown that principled techniques for syntactic and pragmatic analysis can be bolstered with methods for achieving robustness. We describe and evaluate a method for dealing with unknown words and a method for filtering ... |
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| TACITUS: Text Understanding for Strategic Computing |
NOV 90 |
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| Authors:
Jerry R. Hobbs; SRI INTERNATIONAL MENLO PARK CA
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| The aim of the TACITUS project was to elaborate a theory of how knowledge is used in the interpretation of discourse, and to implement this theory in a computer system for understanding naturally generated texts. This research was carried out between May 1985 and September 1990. The principal results of the research were as follows: 1) The development of a theory of inference in discourse interpretation based on weighted abduction. ... |
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| Machine Translation Using Abductive Inference |
90 |
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| Authors:
Jerry R. Hobbs; Megumi Kameyama; SRI INTERNATIONAL MENLO PARK CA
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| Machine Translation and World Knowledge. Many existing approaches to machine translation take for granted that the information presented in the output is found somewhere in the input, and, moreover, that such information should be expressed at a single representational level, say, in terms of the parse trees or of semantic assertions. Languages, however, not only express the equivalent information by drastically different linguistic means, but also often disagree in what ... |
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| Making Computational Sense of Montague's Intesional Logic. |
DEC 1976 |
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| Authors:
Jerry R. Hobbs; Stanley J. Rosenschein; NEW YORK UNIV N Y COURANT INST OF MATHEMATICAL SCIENCES
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| A simplified version of Montague's intensional logic is presented and explicated in terms of computational analogues. Several examples are presented in which Montague's formalism is coupled with a procedural interpretation. A natural translation is given from intensional logic into LISP. The relevance of this research to composition of meaning, knowledge representation, context and expectation is discussed. (Author) |
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