Assertion: snorkel's tube | /r/HasProperty | curved
Facets:
Source sentences:
text: A snorkel is a curved tube that allows you to breathe air from the surface while your head is submerged in water.
text: The improvements comprise a mouthpiece designed to fit either over or into the mouth with at least one and preferably a pair of contoured tubes which are curved to generally conform to the shape of the user's face.