Question: who is the actor that plays the flash
[{'answer': 'Thomas Grant Gustin', 'provenance': [{'wikipedia_id': '33369001', 'title': 'Grant Gustin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '33369001', 'title': 'Grant Gustin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 266, 'bleu_score': 0.691467648678544, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 370396383630426220}, 'section': 'Section::::Abstract.'}]}]