Question: Them Firewater Boyz Vol. 1 featured Chad Butler who was a founding member of which group?
{'answer': 'Underground Kingz', 'supporting_facts': [['Them Firewater Boyz, Vol. 1', 0], ['Them Firewater Boyz, Vol. 1', 3], ['Pimp C', 0], ['Pimp C', 1]]}