His research was in the area of language understanding or technologies which relate to it, such as knowledge representation, reasoning under uncertainty, and learning.
His research in this area included work in the subareas of part-of-speech tagging, probabilistic context-free grammar induction, and, more recently, syntactic disambiguation through word statistics, efficient syntactic parsing, and lexical resource acquisition through statistical means.
He was a Fellow of the American Association of Artificial Intelligence and was previously a Councilor of the organization.
[4] In 2015, he won the Association for the Advancement of Artificial Intelligence (AAAI) Classic Paper Award for a paper (“Statistical Parsing with a Context-Free Grammar and Word Statistics”) that he presented at the Fourteenth National Conference on Artificial Intelligence in 1997.
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