Question: where did pluvial lakes form during the last ice age
[{'answer': 'southwestern United States', 'provenance': [{'wikipedia_id': '464150', 'title': 'Pluvial lake', 'start_paragraph_id': 6, 'start_character': 48, 'end_paragraph_id': 6, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Geology.\n'}]}, {'provenance': [{'wikipedia_id': '464150', 'title': 'Pluvial lake', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 287, 'bleu_score': 0.754407834997855, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14064493961574681685}, 'section': 'Section::::Geology.\n'}]}]