Question: when did the american war of independence begin and end
[{'answer': 'April 19 , 1775', 'provenance': [{'wikipedia_id': '771', 'title': 'American Revolutionary War', 'start_paragraph_id': 3, 'start_character': 86, 'end_paragraph_id': 3, 'end_character': 101, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'September 3 , 1783', 'provenance': [{'wikipedia_id': '771', 'title': 'American Revolutionary War', 'start_paragraph_id': 102, 'start_character': 537, 'end_paragraph_id': 102, 'end_character': 555, 'bleu_score': 1.0, 'section': 'Section::::Peace of Paris.\n'}]}]