Conversation so far:
In what year did John Hartson join Luton Town?
1992.
Did John Hartson play for Arsenal?
In January 1995, at 19, he joined Arsenal.
How many goals did he score in his Arsenal career?
CANNOTANSWER.
What year did he leave Arsenal?
in February 1997.

Question: What position did he play at Arsenal?
Self-contained rewrite: What position did John Hartson play at Arsenal?