Question: when did the north american colonies break away from great britain
[{'answer': '1783', 'provenance': [{'wikipedia_id': '1973', 'title': 'American Revolution', 'start_paragraph_id': 1, 'start_character': 78, 'end_paragraph_id': 1, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1973', 'title': 'American Revolution', 'start_paragraph_id': 4, 'start_character': 86, 'end_paragraph_id': 4, 'end_character': 1287, 'bleu_score': 0.622238299936799, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16011927903087627175}, 'section': 'Section::::Abstract.'}]}]