Assertion: mucus | /r/CapableOf | act as lubricant
Facets:
value: to speakfor the body
type: PURPOSE
Source sentences:
text: Mucus is a slimy, slippery fluid that acts as a lubricant and protects various structures in the body.
text: Mucus (also known as snot, phlegm and catarrh) works as a lubricant, so to speak, for the body.