Question:
Where was Caroline Aigle educated in Sep, 1996?

Context:
 Caroline Aigle attended Prytanée National Militaire from Jan, 1992 to Jan, 1994. 
 Caroline Aigle attended Lycée militaire de Saint-Cyr from Jan, 1988 to Jan, 1992. 
 Caroline Aigle attended École polytechnique from Jan, 1994 to Jan, 1997. 
 Caroline Aigle attended School of the Air from Jan, 1997 to Jan, 1998.

Answer:
École polytechnique