Question:
Which employer did Kenkichi Iwasawa work for in Aug, 1981?

Context:
 Kenkichi Iwasawa works for University of Tokyo from Jan, 1947 to Jan, 1950. 
 Kenkichi Iwasawa works for Institute for Advanced Study from Jan, 1950 to Jan, 1952. 
 Kenkichi Iwasawa works for Massachusetts Institute of Technology from Jan, 1952 to Jan, 1967. 
 Kenkichi Iwasawa works for Princeton University from Jan, 1967 to Jan, 1986.

Answer:
Question:
Which employer did Kenkichi Iwasawa work for in Aug, 1981?

Context:
 Kenkichi Iwasawa works for University of Tokyo from Jan, 1947 to Jan, 1950. 
 Kenkichi Iwasawa works for Institute for Advanced Study from Jan, 1950 to Jan, 1952. 
 Kenkichi Iwasawa works for Massachusetts Institute of Technology from Jan, 1952 to Jan, 1967. 
 Kenkichi Iwasawa works for Princeton University from Jan, 1967 to Jan, 1986.

Answer:
user
Princeton University
assistant
Question:
Which employer did Kenkichi Iwasawa work for in Aug, 1981?

Context:
 Kenkichi Iwasawa works for University of Tokyo from Jan, 1947 to Jan, 1950. 
 Kenkichi Iwasawa works for Institute for Advanced Study from Jan, 1950 to Jan, 1952. 
 Kenkichi Iwasawa works for Massachusetts Institute of Technology from Jan, 1952 to Jan, 1967. 
 Kenkichi Iwasawa works for Princeton University from Jan, 1967 to Jan, 1986.

Answer:
user
University of Tokyo
Massachusetts Institute of Technology
Institute for Advanced Study
assistant
Question:
Which employer did Kenkichi Iwasawa work for in Aug, 1981?

Context:
 Kenkichi Iwasawa works for University of Tokyo from Jan, 1947 to Jan, 1950. 
 Kenkichi Iwasawa works for Institute for Advanced Study from Jan, 1950 to Jan, 1952. 
 Kenkichi Iwasawa works for Massachusetts Institute of Technology from Jan, 1952 to Jan, 1967. 
 Kenkichi Iwasawa works for Princeton University from Jan, 1967 to Jan, 1986.

Answer:
user
Princeton University
assistant