Conversation so far:
What is Feyenoord?
Feyenoord Rotterdam is a Dutch professional football club in Rotterdam.
Was the dutch professional football club Feyenoord a wining team?
Feyenoord is one of the most successful clubs in Dutch football, winning 15 Eredivisie titles, 13 KNVB Cups, and 4 Johan Cruyff Shields.
What year did Robin Van Persie  sign the 4 year contract?
On May 17,  2004

Question: What did he play during the season?
Self-contained rewrite: What did Robin Van Persie play during the season when he signed a 4 year contract on May 17, 2004?