Question: who plays the flash on the tv series
[{'answer': 'Grant Gustin', 'provenance': [{'wikipedia_id': '44132170', 'title': 'List of The Flash characters', 'start_paragraph_id': 2, 'start_character': 67, 'end_paragraph_id': 2, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44132170', 'title': 'List of The Flash characters', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 794, 'bleu_score': 0.564749098196882, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12504693601963218953}, 'section': 'Section::::Abstract.'}]}]