Question:
Which employer did Annie Lacroix-Riz work for in May, 1993?

Context:
 Annie Lacroix-Riz works for Paris Diderot University from Oct, 1997 to Sep, 2010. 
 Annie Lacroix-Riz works for University of Paris 1 Pantheon-Sorbonne from Jan, 1970 to Jan, 1972. 
 Annie Lacroix-Riz works for University Toulouse - Jean Jaurès from Jan, 1985 to Sep, 1997.

Answer:
University Toulouse - Jean Jaurès