Question: the opening to the snail shell is known as the
[{'answer': 'Aperture', 'provenance': [{'wikipedia_id': '9769384', 'title': 'Gastropod shell', 'start_paragraph_id': 1, 'start_character': 494, 'end_paragraph_id': 1, 'end_character': 502, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]