Question: what was the most significant result of the european exploration through the columbian exchange
[{'answer': 'cultural exchanges', 'provenance': [{'wikipedia_id': '622746', 'title': 'Columbian exchange', 'start_paragraph_id': 1, 'start_character': 613, 'end_paragraph_id': 1, 'end_character': 631, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'transfer of people between continents'}, {'provenance': [{'wikipedia_id': '622746', 'title': 'Columbian exchange', 'start_paragraph_id': 1, 'start_character': 95, 'end_paragraph_id': 1, 'end_character': 691, 'bleu_score': 0.7512521551810101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13812065829382546936}, 'section': 'Section::::Abstract.'}]}]