Question:
Which employer did Herman Goldstine work for in Sep, 1940?

Context:
 Herman Goldstine works for IBM from Jan, 1958 to Jan, 1973. 
 Herman Goldstine works for University of Chicago from Jan, 1936 to Jan, 1939. 
 Herman Goldstine works for United States Army from Jan, 1941 to Jan, 1946. 
 Herman Goldstine works for Institute for Advanced Study from Jan, 1973 to Jan, 1984. 
 Herman Goldstine works for University of Michigan from Jan, 1939 to Jan, 1941.

Answer:
University of Michigan