Question: when did the shootout at the ok corral happen
[{'answer': 'October 26 , 1881', 'provenance': [{'wikipedia_id': '64211', 'title': 'Gunfight at the O.K. Corral', 'start_paragraph_id': 169, 'start_character': 258, 'end_paragraph_id': 169, 'end_character': 275, 'bleu_score': 1.0, 'section': 'Section::::Public reaction.:Sympathy for Cowboys.\n'}]}]