I am a postdoctoral fellow at Carnegie Mellon University, working with Prof. Tom Mitchell. I completed my Ph.D. in the Department of Computer Science at Cornell University in August 2015, advised by Prof. Claire Cardie. I received my B.S. and M.S. degrees in Computer Science from Peking University.

My research interests are natural language processing and machine learning. The theme of my research has been developing effective machine learning models for semantic structure extraction from natural language text. My Ph.D. thesis develops methods and systems for automatic extraction of opinions and events from text documents, enabling machines to access and analyze information otherwise unavailable, for example, knowing who did what to whom and who has opinions about what.

Currently, I am working on the NELL project at CMU, developing new methods for automatic knowledge base construction from large text datasets and methods for improving machine reading using background knowledge.