Conversation so far:
where did Jacqueline Kennedy Onassis go to College?
Vassar College and George Washington University
What year did Jacqueline Kennedy Onassis go to college?
In the fall of 1947, Bouvier entered Vassar College in Poughkeepsie, New York, which at that time was an all-women's institution.

Question: what did she study in college?
Self-contained rewrite: what did Jacqueline Kennedy Onassis study in college?