Question: number of episodes in the flash season 4
[{'answer': '23', 'provenance': [{'wikipedia_id': '53527130', 'title': 'The Flash (season 4)', 'start_paragraph_id': 1, 'start_character': 181, 'end_paragraph_id': 1, 'end_character': 183, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]