Question: who was the us president when nafta was founded
[{'answer': 'George H.W. Bush'}, {'provenance': [{'wikipedia_id': '22050', 'title': 'North American Free Trade Agreement', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 260, 'bleu_score': 0.520959792832522, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13739598562833452630}, 'section': 'Section::::Negotiation, ratification, and revision (1988–94).\n'}]}]