Question: where does the idea of purgatory come from
[{'answer': 'antiquity', 'provenance': [{'wikipedia_id': '13953534', 'title': 'History of Purgatory', 'start_paragraph_id': 1, 'start_character': 52, 'end_paragraph_id': 1, 'end_character': 61, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13953534', 'title': 'History of Purgatory', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 894, 'bleu_score': 0.9865312178338931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8769035278851929359}, 'section': 'Section::::Abstract.'}]}]