Question: who played the shooter on grey's anatomy
[{'answer': "Michael O'Neill", 'provenance': [{'wikipedia_id': '47069325', 'title': "Death and All His Friends (Grey's Anatomy)", 'start_paragraph_id': 1, 'start_character': 729, 'end_paragraph_id': 1, 'end_character': 744, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47069325', 'title': "Death and All His Friends (Grey's Anatomy)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 927, 'bleu_score': 0.9774114419330401, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18055275347433378792}, 'section': 'Section::::Abstract.'}]}]