Question: how many prisoners in the us have life sentences
[{'answer': 'Over 159,000', 'provenance': [{'wikipedia_id': '15549479', 'title': 'Life imprisonment in the United States', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Statistics.\n'}]}, {'provenance': [{'wikipedia_id': '15549479', 'title': 'Life imprisonment in the United States', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 269, 'bleu_score': 0.8677319190106251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11422266535807874850}, 'section': 'Section::::Statistics.\n'}]}]