Question: who is the director of the boston pops
[{'answer': 'Keith Lockhart', 'provenance': [{'wikipedia_id': '200414', 'title': 'Boston Pops Orchestra', 'start_paragraph_id': 3, 'start_character': 59, 'end_paragraph_id': 3, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '200414', 'title': 'Boston Pops Orchestra', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 73, 'bleu_score': 0.8385766789076251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4436857708213226195}, 'section': 'Section::::Abstract.'}]}]