Question: who directed the musical episode of grey's anatomy
[{'answer': 'Tony Phelan', 'provenance': [{'wikipedia_id': '31294286', 'title': 'Song Beneath the Song', 'start_paragraph_id': 1, 'start_character': 368, 'end_paragraph_id': 1, 'end_character': 379, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31294286', 'title': 'Song Beneath the Song', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 676, 'bleu_score': 0.9823771291847391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2356302686724497351}, 'section': 'Section::::Abstract.'}]}]