Question: when did the united states gain independence from britain
[{'answer': 'September 3 , 1783', 'provenance': [{'wikipedia_id': '1973', 'title': 'American Revolution', 'start_paragraph_id': 4, 'start_character': 970, 'end_paragraph_id': 4, 'end_character': 988, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1973', 'title': 'American Revolution', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1287, 'bleu_score': 0.7557045269011391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10617888675918456181}, 'section': 'Section::::Abstract.'}]}]