Question: who implemented an economic embargo in 1807 in an effort to avoid war
[{'answer': 'President Thomas Jefferson', 'provenance': [{'wikipedia_id': '55564', 'title': 'Embargo Act of 1807', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]