Assertion: rattlesnake's skin | /r/HasProperty | shed
Facets:
Source sentences:
text: At birth, a “prebutton” is present at the tip of the snake's tail; it is replaced by the “button” several days later when the first skin is shed.
text: However, no sound can be made by the rattle until a second segment is added when the skin is shed again.
text: Each time the skin is shed, a new segment is added to the base of the tail.
text: Rattle growth: Add a “rattle” made of hardened keratin (like fingernails) each time skin is shed