Question: where do caribou live in the united states
[{'answer': 'northern United States'}, {'answer': 'Alaska', 'provenance': [{'wikipedia_id': '143912', 'title': 'Reindeer', 'start_paragraph_id': 2, 'start_character': 173, 'end_paragraph_id': 2, 'end_character': 179, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]