Question:
Where was Stilianos Alexiou educated in Sep, 1961?

Context:
 Stilianos Alexiou attended École normale supérieure  (Paris) from Jan, 1961 to Jan, 1962. 
 Stilianos Alexiou attended National Center for Scientific Research from Jan, 1951 to Jan, 1952. 
 Stilianos Alexiou attended National and Kapodistrian University of Athens from Jan, 1939 to Jan, 1946.

Answer:
École normale supérieure  (Paris)