Question: what type of scale is found in scoliodon
[{'answer': 'placoid', 'provenance': [{'wikipedia_id': '6771770', 'title': 'Scoliodon', 'start_paragraph_id': 5, 'start_character': 247, 'end_paragraph_id': 5, 'end_character': 254, 'bleu_score': 1.0, 'section': 'Section::::Body.\n'}]}, {'provenance': [{'wikipedia_id': '6771770', 'title': 'Scoliodon', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 446, 'bleu_score': 0.9140935010137651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9807122908480675439}, 'section': 'Section::::Body.\n'}]}]