Question:
Which employer did Simon Schama work for in Jul, 1967?

Context:
 Simon Schama works for Columbia University from Jan, 1994 to Jan, 1994. 
 Simon Schama works for University of Oxford from Jan, 1976 to Jan, 1980. 
 Simon Schama works for Christ's College from Jan, 1966 to Jan, 1976. 
 Simon Schama works for Harvard University from Jan, 1980 to Jan, 1993.

Answer:
Christ's College