Question: who has won the most gold cups in soccer
[{'answer': 'Mexico', 'provenance': [{'wikipedia_id': '250685', 'title': 'CONCACAF Gold Cup', 'start_paragraph_id': 4, 'start_character': 499, 'end_paragraph_id': 4, 'end_character': 505, 'bleu_score': 1.0, 'section': 'Section::::History.:Championships before CONCACAF.\n'}]}, {'provenance': [{'wikipedia_id': '250685', 'title': 'CONCACAF Gold Cup', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 237, 'bleu_score': 0.887508747915121, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10473164062572804404}, 'section': 'Section::::History.:CONCACAF Gold Cup (since 1991).\n'}]}]