Question: who plays the transgender on grey's anatomy
[{'answer': 'Alexandra Scott Billings', 'provenance': [{'wikipedia_id': '6603753', 'title': 'Alexandra Billings', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6603753', 'title': 'Alexandra Billings', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 499, 'bleu_score': 0.9754554449993441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5097329993173552173}, 'section': 'Section::::Abstract.'}]}]