Question: where does the sand come from on waikiki beach
[{'answer': 'Manhattan Beach , California ,', 'provenance': [{'wikipedia_id': '59649', 'title': 'Waikiki', 'start_paragraph_id': 13, 'start_character': 46, 'end_paragraph_id': 13, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'nearby shoals', 'provenance': [{'wikipedia_id': '59649', 'title': 'Waikiki', 'start_paragraph_id': 18, 'start_character': 90, 'end_paragraph_id': 18, 'end_character': 103, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]