Question: where did tomatoes come from in the columbian exchange
[{'answer': 'the Americas', 'provenance': [{'wikipedia_id': '622746', 'title': 'Columbian exchange', 'start_paragraph_id': 1, 'start_character': 213, 'end_paragraph_id': 1, 'end_character': 225, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '622746', 'title': 'Columbian exchange', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 596, 'bleu_score': 0.761131772922469, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2250428341585190630}, 'section': 'Section::::Influence.:Crops.\n'}]}]