Question:
Which employer did Dominique Kalifa work for in Apr, 2001?

Context:
 Dominique Kalifa works for University of Rennes 2 – Upper Brittany from Jan, 2000 to Jan, 2002. 
 Dominique Kalifa works for Sciences Po from Jan, 2008 to Jan, 2015. 
 Dominique Kalifa works for Paris Diderot University from Jan, 1995 to Jan, 2000. 
 Dominique Kalifa works for University of Paris 1 Pantheon-Sorbonne from Sep, 2002 to Sep, 2020.

Answer:
University of Rennes 2 – Upper Brittany