Question: who played dr frankenstein in once upon a time
[{'answer': 'David Anders', 'provenance': [{'wikipedia_id': '365365', 'title': 'David Anders', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '365365', 'title': 'David Anders', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 479, 'bleu_score': 0.976327165973018, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14659188937799029873}, 'section': 'Section::::Abstract.'}]}]