Friday, September 19, 2008
12:30 PM
CSB 632
Ben Van Durme
University of Rochester
Open Knowledge Extraction
We present results for a system designed to perform \emph{Open
Knowledge Extraction}, based on a tradition of compositional language
processing, as applied to a large collection of text derived from the
Web. Evaluation through manual assessment shows that well-formed
propositions of reasonable quality, representing general world
knowledge, given in a logical form potentially useable for inference,
may be extracted in high volume from arbitrary input sentences. We
compare these results with those obtained in recent work on Open
\emph{Information} Extraction, indicating with some examples the quite
different kinds of output obtained by the two approaches. Finally, we
observe that portions of the extracted knowledge are comparable to
results of recent work on \emph{class attribute} extraction.