Question: where does the sand in waikiki come from
[{'answer': 'Manhattan Beach , California', 'provenance': [{'wikipedia_id': '59649', 'title': 'Waikiki', 'start_paragraph_id': 13, 'start_character': 46, 'end_paragraph_id': 13, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]