Question: what is the least populated county in the us
[{'answer': 'Kalawao County', 'provenance': [{'wikipedia_id': '91512', 'title': 'Loving County, Texas', 'start_paragraph_id': 1, 'start_character': 201, 'end_paragraph_id': 1, 'end_character': 215, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '91512', 'title': 'Loving County, Texas', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 462, 'bleu_score': 0.8180675594084871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7527922577410885714}, 'section': 'Section::::Abstract.'}]}]