Question: who is dr altman on grey's anatomy
[{'answer': 'Kim Raver', 'provenance': [{'wikipedia_id': '6548618', 'title': 'Teddy Altman', 'start_paragraph_id': 1, 'start_character': 121, 'end_paragraph_id': 1, 'end_character': 130, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6548618', 'title': 'Teddy Altman', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 602, 'bleu_score': 0.9810405040225261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7804015964736316943}, 'section': 'Section::::Abstract.'}]}]