Conversation so far:
Where did Phil Mickelson attend college?
Phil Mickelson attended Arizona State University in Tempe on a golf scholarship.
What year did Phil Mickelson go to college?
Phil Mickelson started his collegiate career with national titles in his freshman and sophomore years of 1989 and 1990.

Question: Was his college golf career successful?
Self-contained rewrite: Was Phil Mickelson's college golf career successful?