Question: what term refers to the visible part of the tooth
[{'answer': 'clinical crown', 'provenance': [{'wikipedia_id': '9099027', 'title': 'Dental anatomy', 'start_paragraph_id': 20, 'start_character': 218, 'end_paragraph_id': 20, 'end_character': 232, 'bleu_score': 1.0, 'section': 'Section::::Anatomic landmarks.:Crown and root.\n'}]}, {'provenance': [{'wikipedia_id': '9099027', 'title': 'Dental anatomy', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 630, 'bleu_score': 0.9598415906376221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16442490161814579641}, 'section': 'Section::::Anatomic landmarks.:Crown and root.\n'}]}]