Question: what part of the internal female anatomy is self-cleaning
[{'answer': 'vagina', 'provenance': [{'wikipedia_id': '32476', 'title': 'Vagina', 'start_paragraph_id': 1, 'start_character': 16, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]