Question: who was the first black nfl starting quarterback
[{'answer': 'Marlin Oliver Briscoe', 'provenance': [{'wikipedia_id': '1922788', 'title': 'Marlin Briscoe', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1922788', 'title': 'Marlin Briscoe', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 368, 'bleu_score': 0.8073086585947221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 85235254815323991}, 'section': 'Section::::Abstract.'}]}]