Question: who plays dr ross on grey's anatomy
[{'answer': 'Gaius Laban Charles'}, {'provenance': [{'wikipedia_id': '10687704', 'title': 'Gaius Charles', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 327, 'bleu_score': 0.541011662098636, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6196729041084305961}, 'section': 'Section::::Abstract.'}]}]