Assertion: frontal bone's surface | /r/HasProperty | unprotected
Facets:
value: by the muscles
type: CAUSE
Source sentences:
text: The anterior surface of the tibia is a sharp ridge, the anterior border, that is unprotected by the muscles; thus, it is easily felt beneath the skin.
text: The anterior surface of the tibia is a sharp ridge, the anterior border, that is unprotected by the muscles; thus, it is easily felt beneath the skin.