Assertion: backbone | /r/MadeOf | tiny bones
Facets:
Source sentences:
text: The backbone is made of tiny bones, called vertebrae, that make up one large backbone, or vertebral column.
text: The backbone is made of tiny bones, called vertebrae, that make up one large backbone, or vertebral column.
text: The backbone is made of tiny bones, called vertebrae, that make up one large backbone, or vertebral column.