Question: who did tom ellis play in once upon a time
[{'answer': 'Robin of Locksley', 'provenance': [{'wikipedia_id': '48161460', 'title': 'Robin Hood (Once Upon a Time)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '48161460', 'title': 'Robin Hood (Once Upon a Time)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 513, 'bleu_score': 0.9776501033621461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4146580692946486357}, 'section': 'Section::::Abstract.'}]}]