Assertion: stilt's leg | /r/HasProperty | covered with tougher skin than the skin
Facets:
Source sentences:
text: Since birds spend most of their lives perching, the feet and legs are covered with tougher skin than the skin on the rest of the bird's body.
text: Since birds spend most of their lives perching, the feet and legs are covered with tougher skin than the skin on the rest of the bird's body.