Question: when did the last episode of naruto shippuden air
[{'answer': 'March 23 , 2017', 'provenance': [{'wikipedia_id': '9089624', 'title': 'List of Naruto: Shippuden episodes', 'start_paragraph_id': 1, 'start_character': 394, 'end_paragraph_id': 1, 'end_character': 409, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]