Question:
Which employer did Mitchell Feigenbaum work for in Aug, 1971?

Context:
 Mitchell Feigenbaum works for Cornell University from Jan, 1970 to Jan, 1972. 
 Mitchell Feigenbaum works for Virginia Tech from Jan, 1972 to Jan, 1974. 
 Mitchell Feigenbaum works for The Rockefeller University from Jan, 1987 to Jan, 2019.

Answer:
Cornell University