I am a Professor in Computer Science and Cognitive Science at Johns Hopkins University.

My work focuses on helping people work with large amounts of information. This involves finding and reasoning over what is expressed in documents and images. I am a member of the Center for Language and Speech Processing (CLSP) , the Data Science and AI Institute (DSAI), and the Human Language Technology Center of Excellence (HLTCOE).

With my collaborators I publish on topics in AI reasoning and safety, language modeling, natural language processing, data mining, machine learning, and linguistic semantics and cognitive science. See Research Areas for details about our current interests.

I also lead a research team within Microsoft Frontier Tuning.