Complex sentence: Van Gogh was a member of the Dutch republican society "Republikeins Genootschap" which advocates the abolition of the Dutch monarchy, and a friend and supporter of the controversial Dutch politician Pim Fortuyn who was assassinated in 2002.
Split into simpler sentences: Van Gogh was a member of the Dutch republican society "Republikeins Genootschap", which advocates the abolition of the Dutch monarchy. He was a friend and supporter of the controversial Dutch politician Pim Fortuyn, who was assassinated in 2002.