Question: what is the largest prison in the united states
[{'answer': 'Angola', 'provenance': [{'wikipedia_id': '1061897', 'title': 'Louisiana State Penitentiary', 'start_paragraph_id': 1, 'start_character': 43, 'end_paragraph_id': 1, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1061897', 'title': 'Louisiana State Penitentiary', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 660, 'bleu_score': 0.8917200886684951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14252508213007897051}, 'section': 'Section::::Abstract.'}]}]