Table of Contents
Knowledge-Based Question-Answering
Terminology and Key Points
Botany Knowledge Base
An Example of Explanation Generation: The KNIGHT System (J. Lester and B. Porter, Developing and Empirically Evaluating Robust Explanation Generators, Computational Linguistics Journal, 23(1), 1997.)
KNIGHT approach:
Knight System Architecture
View Retriever (L. Acker and B. Porter, Extracting Viewpoints from Knowledge Bases, AAAI-94)
The Viewpoint of Photosynthesis as Production (L. Acker and B. Porter, Extracting Viewpoints from Knowledge Bases, AAAI-94)
A Combination Viewpoint: Flower Structure vis-à-vis Plant Reproduction
Explanation Design Plan for Processes
KNIGHT Evaluation
Results of the Evaluation
Another example (DCE Application)
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1. Representation of situation in question
2. Elaboration (guided by answer schema)
2. Elaboration (guided by answer schema)
3. Assembly of text answer
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The Application Environment
Critique
A Component-Based Approach to Knowledge-Base Construction
Lessons from a Dictionary...
1. Component Theories
Example: Electrical Circuits
Example: Electrical Circuits
Circuits as Distribution Networks
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Component theories in KB-PHaSE
2. Composition
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Compound Concepts are Ubiquitous
Overall Architecture
Overall Architecture
Overall Architecture
Summary
Discussion
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Author: Peter Clark, Bruce Porter, John Thompson
Email: peter.e.clark@boeing.com
Home Page: http://www.cs.utexas.edu/users/pclark
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