Question:
Which employer did Bartel Leendert van der Waerden work for in Feb, 1947?

Context:
 Bartel Leendert van der Waerden works for Royal Dutch Shell from Jan, 1945 to Jan, 1947. 
 Bartel Leendert van der Waerden works for University of Zurich from Jan, 1951 to Jan, 1972. 
 Bartel Leendert van der Waerden works for University of Groningen from Jan, 1928 to Jan, 1931. 
 Bartel Leendert van der Waerden works for University of Amsterdam from May, 1950 to May, 1951. 
 Bartel Leendert van der Waerden works for Leipzig University from Jan, 1931 to Jan, 1945. 
 Bartel Leendert van der Waerden works for Johns Hopkins University from Jan, 1947 to Jan, 1948.

Answer:
Question:
Which employer did Bartel Leendert van der Waerden work for in Feb, 1947?

Context:
 Bartel Leendert van der Waerden works for Royal Dutch Shell from Jan, 1945 to Jan, 1947. 
 Bartel Leendert van der Waerden works for University of Zurich from Jan, 1951 to Jan, 1972. 
 Bartel Leendert van der Waerden works for University of Groningen from Jan, 1928 to Jan, 1931. 
 Bartel Leendert van der Waerden works for University of Amsterdam from May, 1950 to May, 1951. 
 Bartel Leendert van der Waerden works for Leipzig University from Jan, 1931 to Jan, 1945. 
 Bartel Leendert van der Waerden works for Johns Hopkins University from Jan, 1947 to Jan, 1948.

Answer:
user
Johns Hopkins University
assistant
Question:
Which employer did Bartel Leendert van der Waerden work for in Feb, 1947?

Context:
 Bartel Leendert van der Waerden works for Royal Dutch Shell from Jan, 1945 to Jan, 1947. 
 Bartel Leendert van der Waerden works for University of Zurich from Jan, 1951 to Jan, 1972. 
 Bartel Leendert van der Waerden works for University of Groningen from Jan, 1928 to Jan, 1931. 
 Bartel Leendert van der Waerden works for University of Amsterdam from May, 1950 to May, 1951. 
 Bartel Leendert van der Waerden works for Leipzig University from Jan, 1931 to Jan, 1945. 
 Bartel Leendert van der Waerden works for Johns Hopkins University from Jan, 1947 to Jan, 1948.

Answer:
user
Royal Dutch Shell
University of Groningen
Leipzig University
University of Zurich
University of Amsterdam
assistant
Question:
Which employer did Bartel Leendert van der Waerden work for in Feb, 1947?

Context:
 Bartel Leendert van der Waerden works for Royal Dutch Shell from Jan, 1945 to Jan, 1947. 
 Bartel Leendert van der Waerden works for University of Zurich from Jan, 1951 to Jan, 1972. 
 Bartel Leendert van der Waerden works for University of Groningen from Jan, 1928 to Jan, 1931. 
 Bartel Leendert van der Waerden works for University of Amsterdam from May, 1950 to May, 1951. 
 Bartel Leendert van der Waerden works for Leipzig University from Jan, 1931 to Jan, 1945. 
 Bartel Leendert van der Waerden works for Johns Hopkins University from Jan, 1947 to Jan, 1948.

Answer:
user
Johns Hopkins University
assistant