Question: who was the first african american to walk in space
[{'answer': 'Bernard Anthony Harris Jr.', 'provenance': [{'wikipedia_id': '604803', 'title': 'Bernard A. Harris Jr.', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '604803', 'title': 'Bernard A. Harris Jr.', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 257, 'bleu_score': 0.890257934258152, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6034206233117589276}, 'section': 'Section::::Abstract.'}]}]