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I am an Associate Professor in the Computer and Information Science Department at the University of Pennsylvania. My research interests include statistical machine translation, data-driven paraphrasing, and crowdsourcing.

I will serve as the General Chair for ACL 2017, which will be held in Vancouver, Canada from July 30 - August 4, 2017. I am the Secretary-Treasurer for SIGDAT, which organizes the EMNLP conferences. I was the Program Co-Chair for EMNLP 2015. I am an action editor for the new journal Transactions of the ACL (TACL). I recently finished my terms on the editorial board of Computational Linguistics, and as the Chair of the NAACL Executive Board. In 2014, I was named a Sloan Research Fellow.

My research group released PPDB, the paraphrase database, a resource with 169 million paraphrase transformation rules.

We developed Joshua, an open source decoder for statistical machine translation, which uses synchronous context free grammars, and extracts linguistically informed translation rules.

I got tenure in June of 2017. Yay! If you would like to read my materials, here they are:

Research Statement

Teaching Statement

Curriculum Vitae

Google Scholar Profile

Office: Levine 506
Office Hours: By appointment (Summer '17)