Question: who was the first african american to play in baseball's major leagues
[{'answer': 'Jackie Robinson', 'provenance': [{'wikipedia_id': '757798', 'title': 'Baseball color line', 'start_paragraph_id': 3, 'start_character': 40, 'end_paragraph_id': 3, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '757798', 'title': 'Baseball color line', 'start_paragraph_id': 34, 'start_character': 0, 'end_paragraph_id': 34, 'end_character': 404, 'bleu_score': 0.921555793996895, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10113260216223475075}, 'section': 'Section::::Jackie Robinson and Larry Doby.\n'}]}]