Conversation so far:
What year was Pim Fortuyn assassinated?
2002
Who assassinated Pim Fortuyn?
Volkert van derr Graaf assassinated Pim Fortyun.
Why was Pim Fortuyn assassinated by Volkert van derr Graaf?
Volkert van der Graaf said he murdered Pim Fortuyn to stop him from exploiting Muslims as scapegoats and targeting the weak members of society in seeking political power.

Question: Where did this occur?
Self-contained rewrite: Where was Pim Fortuyn assassinated?