Question: who plays barry allen in the flash tv show
[{'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': 0.6587800272573231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12088228844301851547}, 'section': 'Section::::Abstract.'}]}]