Question: when did the battle of buxar take place
[{'answer': '22 October 1764'}, {'provenance': [{'wikipedia_id': '2406228', 'title': 'Battle of Buxar', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 556, 'bleu_score': 0.69466095305032, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12443936520636607437}, 'section': 'Section::::Abstract.'}]}]