Question: which enterprise in the spanish colonies was most profitable
[{'answer': 'silver mines', 'provenance': [{'wikipedia_id': '303062', 'title': 'Spanish Empire', 'start_paragraph_id': 64, 'start_character': 471, 'end_paragraph_id': 64, 'end_character': 483, 'bleu_score': 1.0, 'section': 'Section::::The Spanish Habsburgs 1516-1700.\n'}]}, {'provenance': [{'wikipedia_id': '303062', 'title': 'Spanish Empire', 'start_paragraph_id': 64, 'start_character': 0, 'end_paragraph_id': 64, 'end_character': 1734, 'bleu_score': 0.9653887116516521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5745535888957137638}, 'section': 'Section::::The Spanish Habsburgs 1516-1700.\n'}]}]