Question: what makes the sand white in new mexico
[{'answer': 'gypsum and calcium sulfate', 'provenance': [{'wikipedia_id': '125886', 'title': 'White Sands, New Mexico', 'start_paragraph_id': 11, 'start_character': 134, 'end_paragraph_id': 11, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::The desert.\n'}]}, {'provenance': [{'wikipedia_id': '125886', 'title': 'White Sands, New Mexico', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 500, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11721386456670209168}, 'section': 'Section::::The desert.\n'}]}]