Question: What is the stage name of the American rapper from Michigan, who was a member of Funky Cowboys, Good Sqwad, and most notably for a group in which half the members made a guest appearance on the debut solo album 'The People vs' by Trick-Trick?
{'answer': 'Proof', 'supporting_facts': [['The People vs.', 0], ['The People vs.', 3], ['Proof (rapper)', 0], ['Proof (rapper)', 1]]}