Question: who has won the most world baseball classic
[{'answer': 'Japan', 'provenance': [{'wikipedia_id': '1877416', 'title': 'World Baseball Classic', 'start_paragraph_id': 6, 'start_character': 369, 'end_paragraph_id': 6, 'end_character': 374, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '1877416', 'title': 'World Baseball Classic', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 556, 'bleu_score': 0.9806740509884301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 957617470155914784}, 'section': 'Section::::Results.:Performance of nations.\n'}]}]