Question: when did the embargo act of 1807 end
[{'answer': 'on March 1 , 1809', 'provenance': [{'wikipedia_id': '55564', 'title': 'Embargo Act of 1807', 'start_paragraph_id': 4, 'start_character': 1023, 'end_paragraph_id': 4, 'end_character': 1040, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55564', 'title': 'Embargo Act of 1807', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1152, 'bleu_score': 0.975009253695653, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7350432472235386318}, 'section': 'Section::::Abstract.'}]}]