Question: first black principal dancer in an american ballet company
[{'answer': 'Misty Danielle Copeland', 'provenance': [{'wikipedia_id': '19014732', 'title': 'Misty Copeland', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19014732', 'title': 'Misty Copeland', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 314, 'bleu_score': 0.9092973921572821, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 637862967417252524}, 'section': 'Section::::Abstract.'}]}]