Question: when does o'malley die in grey's anatomy
[{'answer': 'fifth season', 'provenance': [{'wikipedia_id': '7687024', 'title': "George O'Malley", 'start_paragraph_id': 2, 'start_character': 271, 'end_paragraph_id': 2, 'end_character': 283, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7687024', 'title': "George O'Malley", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 790, 'bleu_score': 0.965664648905967, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8479795469751312452}, 'section': 'Section::::Abstract.'}]}]