Question: what episode does arizona come on grey's
[{'answer': 'fifth season', 'provenance': [{'wikipedia_id': '21539846', 'title': 'Arizona Robbins', 'start_paragraph_id': 1, 'start_character': 157, 'end_paragraph_id': 1, 'end_character': 169, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21539846', 'title': 'Arizona Robbins', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 409, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 641831705447017111}, 'section': 'Section::::Abstract.'}]}]