Abstract

Information extraction from unstructured, ungrammatical data such as classified listings is difficult because traditional structural and grammatical extraction methods do not apply. Previous work has exploited reference sets to aid such extraction, but it did so using supervised machine learning. In this paper, we present an unsupervised approach that both selects the relevant reference set(s) automatically and then uses it for unsupervised extraction. We validate our approach with experimental results that show our unsupervised extraction is competitive with supervised machine learning approaches, including the previous supervised approach that exploits reference sets.

Date

January 1, 1970

Authors

Matthew Michelson, Craig A Knoblock

Journal

International Journal of Document Analysis and Recognition (IJDAR)

Volume

10

Pages

211-226

Publisher

Springer-Verlag