Question: when was the american pledge of allegiance written
[{'answer': 'August 1892', 'provenance': [{'wikipedia_id': '59581', 'title': 'Pledge of Allegiance', 'start_paragraph_id': 7, 'start_character': 76, 'end_paragraph_id': 7, 'end_character': 87, 'bleu_score': 1.0, 'section': 'Section::::Origins.:Balch and Bellamy pledges.\n'}]}, {'provenance': [{'wikipedia_id': '59581', 'title': 'Pledge of Allegiance', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 522, 'bleu_score': 0.8151171447559711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14123578175517154329}, 'section': 'Section::::Origins.:Balch and Bellamy pledges.\n'}]}]