Question: what season does izzie die on grey's anatomy
[{'answer': 'The fifth season', 'provenance': [{'wikipedia_id': '7687022', 'title': 'Izzie Stevens', 'start_paragraph_id': 6, 'start_character': 1046, 'end_paragraph_id': 6, 'end_character': 1062, 'bleu_score': 1.0, 'section': 'Section::::Storylines.\n'}]}, {'provenance': [{'wikipedia_id': '7687022', 'title': 'Izzie Stevens', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 1352, 'bleu_score': 0.9910110079559221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15582143454113687692}, 'section': 'Section::::Storylines.\n'}]}]