Question:
Which employer did Juris Hartmanis work for in Apr, 1957?

Context:
 Juris Hartmanis works for Ohio State University from Jan, 1957 to Jan, 1958. 
 Juris Hartmanis works for Cornell University from Jan, 1955 to Jan, 1957. 
 Juris Hartmanis works for General Electric from Jan, 1958 to Jan, 1965.

Answer:
Question:
Which employer did Juris Hartmanis work for in Apr, 1957?

Context:
 Juris Hartmanis works for Ohio State University from Jan, 1957 to Jan, 1958. 
 Juris Hartmanis works for Cornell University from Jan, 1955 to Jan, 1957. 
 Juris Hartmanis works for General Electric from Jan, 1958 to Jan, 1965.

Answer:
user
Ohio State University
assistant
Question:
Which employer did Juris Hartmanis work for in Apr, 1957?

Context:
 Juris Hartmanis works for Ohio State University from Jan, 1957 to Jan, 1958. 
 Juris Hartmanis works for Cornell University from Jan, 1955 to Jan, 1957. 
 Juris Hartmanis works for General Electric from Jan, 1958 to Jan, 1965.

Answer:
user
General Electric
Cornell University
assistant
Question:
Which employer did Juris Hartmanis work for in Apr, 1957?

Context:
 Juris Hartmanis works for Ohio State University from Jan, 1957 to Jan, 1958. 
 Juris Hartmanis works for Cornell University from Jan, 1955 to Jan, 1957. 
 Juris Hartmanis works for General Electric from Jan, 1958 to Jan, 1965.

Answer:
user
Ohio State University
assistant