Question: who plays dr russell on grey's anatomy
[{'answer': 'Dominic Hoffman', 'provenance': [{'wikipedia_id': '40243830', 'title': 'Dominic Hoffman', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]