Question: how many episodes of black clover is there
[{'answer': '51', 'provenance': [{'wikipedia_id': '56269472', 'title': 'List of Black Clover episodes', 'start_paragraph_id': 1, 'start_character': 496, 'end_paragraph_id': 1, 'end_character': 498, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]