Question: moundville was one of the greatest ceremonial centers of which culture
[{'answer': 'the Mississippian culture', 'provenance': [{'wikipedia_id': '1279493', 'title': 'Mississippian culture', 'start_paragraph_id': 34, 'start_character': 54, 'end_paragraph_id': 34, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Regional variations.:Caddoan Mississippian.\n'}]}, {'provenance': [{'wikipedia_id': '1279493', 'title': 'Mississippian culture', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 157, 'bleu_score': 0.9146912192286941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14488811034841617979}, 'section': 'Section::::Regional variations.:Middle Mississippian.\n'}]}]