Question: Who provides the voice for "Chef" in the Comedy Central series "South Park" on the "Starvin Marvin" episode where Chef tries to get residents to fight back in a parody of the movie Braveheart?
{'answer': 'soul singer Isaac Hayes', 'supporting_facts': [["Starvin' Marvin (South Park)", 0], ["Starvin' Marvin (South Park)", 4], ['Chef (South Park)', 0]]}