Question:
Which employer did Lyman Spitzer work for in Nov, 1994?

Context:
 Lyman Spitzer works for Princeton University from Jan, 1947 to Jan, 1997. 
 Lyman Spitzer works for Harvard University from Jan, 1938 to Jan, 1939. 
 Lyman Spitzer works for Yale University from Jan, 1946 to Jan, 1947.

Answer:
Princeton University