Assertion: dog | /r/HasAspect | third eyelid
Facets:
Source sentences:
text: Dogs have a third eyelid called a haw to protect the eye and help it to remain moist.
text: They have an upper lid, a lower lid and a third lid (a ‘haw’).
text: Dogs Have a Third Eyelid
text: Dogs have a third eyelid, a membrane that protects the eyeball from irritants and is sometimes visible in front of the eye.