Question:
Where was Karestan C Koenen educated in Apr, 1993?

Context:
 Karestan C Koenen attended Teachers College from Jan, 1993 to Jan, 1994. 
 Karestan C Koenen attended Boston University from Jan, 1994 to Jan, 1999. 
 Karestan C Koenen attended Wellesley College from Jan, 1986 to Jan, 1990.

Answer:
Teachers College