Question: what primary product that was wanted in europe grew naturally in brazil
[{'answer': 'rubber', 'provenance': [{'wikipedia_id': '8477116', 'title': 'Agriculture in Brazil', 'start_paragraph_id': 35, 'start_character': 100, 'end_paragraph_id': 35, 'end_character': 106, 'bleu_score': 1.0, 'section': 'Section::::History.:Brazilian Empire: coffee.\n'}]}, {'provenance': [{'wikipedia_id': '8477116', 'title': 'Agriculture in Brazil', 'start_paragraph_id': 38, 'start_character': 0, 'end_paragraph_id': 38, 'end_character': 235, 'bleu_score': 0.9419661180380051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16201395647882393544}, 'section': 'Section::::History.:Brazilian Empire: coffee.:International problems.\n'}]}]