Publication Type |
Journal Article |
School or College |
College of Engineering |
Department |
Computing, School of |
Creator |
Riloff, Ellen M. |
Other Author |
Jones, Rosie |
Title |
Learning dictionaries for information extraction by multi-level bootstrapping |
Date |
1999 |
Description |
Information extraction systems usually require two dictionaries: a semantic lexicon and a dictionary of extraction patterns for the domain. We present a multilevel bootstrapping algorithm that generates both the semantic lexicon and extraction patterns simultaneously. As input, our technique requires only unannotated training texts and a handful of seed words for a category. We use a mutual bootstrapping technique to alternately select the best extraction pattern for the category and bootstrap its extractions into the semantic lexicon, which is the basis for selecting the next extraction pattern. To make this approach more robust, we add a second level of bootstrapping (metabootstrapping) that retains only the most reliable lexicon entries produced by mutual bootstrapping and then restarts the process. We evaluated this multilevel bootstrapping technique on a collection of corporate web pages and a corpus of terrorism news articles. The algorithm produced high-quality dictionaries for several semantic categories. |
Type |
Text |
Publisher |
Association for the Advancement of Artificial Intelligence (AAAI) |
First Page |
1 |
Last Page |
6 |
Subject |
Information extraction; Extraction patterns; Multi-level bootstrapping; Learning dictionaries |
Subject LCSH |
Information retrieval; Natural language processing (Computer science); Programming languages (Electronic computers) -- Semantics |
Language |
eng |
Bibliographic Citation |
Riloff, E., & Jones, R. (1999). Learning dictionaries for information extraction by multi-level bootstrapping. Proceedings of the Sixteenth National Conference on Artificial Intelligence (AAAI-99), 1-6. |
Rights Management |
(c)AAAI http://www.aaai.org/ |
Format Medium |
application/pdf |
Format Extent |
1,093,331 bytes |
Identifier |
ir-main,12411 |
ARK |
ark:/87278/s6bp0m56 |
Setname |
ir_uspace |
ID |
705051 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6bp0m56 |