Question: when did the american revolution start and end
[{'answer': '1775', 'provenance': [{'wikipedia_id': '771', 'title': 'American Revolutionary War', 'start_paragraph_id': 1, 'start_character': 32, 'end_paragraph_id': 1, 'end_character': 36, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '1783', 'provenance': [{'wikipedia_id': '771', 'title': 'American Revolutionary War', 'start_paragraph_id': 1, 'start_character': 36, 'end_paragraph_id': 1, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '771', 'title': 'American Revolutionary War', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 243, 'bleu_score': 0.5128124740444671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3373112637709632013}, 'section': 'Section::::Abstract.'}]}]