Question: where is the most wine produced in california
[{'answer': 'The Central Valley', 'provenance': [{'wikipedia_id': '14660227', 'title': 'California wine', 'start_paragraph_id': 20, 'start_character': 300, 'end_paragraph_id': 20, 'end_character': 318, 'bleu_score': 1.0, 'section': 'Section::::Wine regions.\n'}]}, {'provenance': [{'wikipedia_id': '14660227', 'title': 'California wine', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 606, 'bleu_score': 0.8300885520672331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8234346642434831255}, 'section': 'Section::::Wine regions.\n'}]}]