Question: who said the function of tragedy is to produce the katharsis of pity and fear
[{'answer': 'Aristotle', 'provenance': [{'wikipedia_id': '197055', 'title': 'Catharsis', 'start_paragraph_id': 1, 'start_character': 286, 'end_paragraph_id': 1, 'end_character': 295, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '197055', 'title': 'Catharsis', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 412, 'bleu_score': 0.8217088177005301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7807565803613416261}, 'section': 'Section::::Abstract.'}]}]