Task: Question Answering
Input (English): Context : Stephen Nissenbaum (A.B. Harvard College, 1961; M.A. Columbia University, 1963; Ph.D., University of Wisconsin--Madison, 1968 ), is Professor Emeritus of the History Department, University of Massachusetts at Amherst, specializing in early American history through to the nineteenth century. 
Question : Where did Stephen Nissenbaum study or work?
Output (English): Columbia University