Question: who is known as the leader of an orchestra
[{'answer': 'conductor', 'provenance': [{'wikipedia_id': '22706', 'title': 'Orchestra', 'start_paragraph_id': 3, 'start_character': 32, 'end_paragraph_id': 3, 'end_character': 41, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22706', 'title': 'Orchestra', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 477, 'bleu_score': 0.97451705556073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5950852055342209066}, 'section': 'Section::::Abstract.'}]}]