Question: who is the first black quarterback to win the superbowl
[{'answer': 'Douglas Lee Williams', 'provenance': [{'wikipedia_id': '1078824', 'title': 'Doug Williams (quarterback)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1078824', 'title': 'Doug Williams (quarterback)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 761, 'bleu_score': 0.7446712736026291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15172525596335261479}, 'section': 'Section::::Abstract.'}]}]