Question:
Which employer did Lev Arkadyevich Kaluzhnin work for in Feb, 1946?

Context:
 Lev Arkadyevich Kaluzhnin works for Humboldt University of Berlin from Jan, 1951 to Jan, 1955. 
 Lev Arkadyevich Kaluzhnin works for Taras Shevchenko National University of Kyiv from Jan, 1955 to Jan, 1985. 
 Lev Arkadyevich Kaluzhnin works for National Center for Scientific Research from Jan, 1946 to Jan, 1951.

Answer:
Question:
Which employer did Lev Arkadyevich Kaluzhnin work for in Feb, 1946?

Context:
 Lev Arkadyevich Kaluzhnin works for Humboldt University of Berlin from Jan, 1951 to Jan, 1955. 
 Lev Arkadyevich Kaluzhnin works for Taras Shevchenko National University of Kyiv from Jan, 1955 to Jan, 1985. 
 Lev Arkadyevich Kaluzhnin works for National Center for Scientific Research from Jan, 1946 to Jan, 1951.

Answer:
user
National Center for Scientific Research
assistant
Question:
Which employer did Lev Arkadyevich Kaluzhnin work for in Feb, 1946?

Context:
 Lev Arkadyevich Kaluzhnin works for Humboldt University of Berlin from Jan, 1951 to Jan, 1955. 
 Lev Arkadyevich Kaluzhnin works for Taras Shevchenko National University of Kyiv from Jan, 1955 to Jan, 1985. 
 Lev Arkadyevich Kaluzhnin works for National Center for Scientific Research from Jan, 1946 to Jan, 1951.

Answer:
user
Humboldt University of Berlin
Taras Shevchenko National University of Kyiv
assistant
Question:
Which employer did Lev Arkadyevich Kaluzhnin work for in Feb, 1946?

Context:
 Lev Arkadyevich Kaluzhnin works for Humboldt University of Berlin from Jan, 1951 to Jan, 1955. 
 Lev Arkadyevich Kaluzhnin works for Taras Shevchenko National University of Kyiv from Jan, 1955 to Jan, 1985. 
 Lev Arkadyevich Kaluzhnin works for National Center for Scientific Research from Jan, 1946 to Jan, 1951.

Answer:
user
National Center for Scientific Research
assistant