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Author Simmons, Robert F. ♦ Burger, John F. ♦ Schwarcz, Robert M.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Subject Keyword Language processing ♦ Semantics ♦ Protosynthex iii ♦ Natural language ♦ Question answering ♦ Computational linguistics ♦ Artificial intelligence ♦ Lisp ♦ Fact retrieval
Abstract The question-answering aspects of the Protosynthex III prototype language processing system are described and exemplified in detail. The system is written in LISP 1.5 and operates on the Q-32 time-sharing system. The system's data structures and their semantic organization, the deductive question-answering formalism of relational properties and complex-relation-forming operators, and the question-answering procedures which employ these features in their operation are all described and illustrated. Examples of the system's performance and of the limitations of its question-answering capability are presented and discussed. It is shown that the use of semantic information in deductive question answering greatly facilitates the process, and that a top-down procedure which works from question to answer enables effective use to be made of this information. It is concluded that the development of Protosynthex III into a practically useful system to work with large data bases is possible but will require changes in both the data structures and the algorithms used for question answering.
Description Affiliation: System Development Corp., Santa Monica, CA (Schwarcz, Robert M.; Burger, John F.; Simmons, Robert F.)
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-08-01
Publisher Place New York
Journal Communications of the ACM (CACM)
Volume Number 13
Issue Number 3
Page Count 17
Starting Page 167
Ending Page 183


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Source: ACM Digital Library