Question: what season of grey's does izzy get cancer
[{'answer': 'fifth season', 'provenance': [{'wikipedia_id': '7687022', 'title': 'Izzie Stevens', 'start_paragraph_id': 2, 'start_character': 487, 'end_paragraph_id': 2, 'end_character': 499, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7687022', 'title': 'Izzie Stevens', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1190, 'bleu_score': 0.9499803547490071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8106039338251956907}, 'section': 'Section::::Abstract.'}]}]