Assertion: snorkel | /r/HasProperty | effective
Facets:
value: in preventing waves of water
type: TRANSITIVE-OBJECT
value: interestingly
type: DEGREE
Source sentences:
text: Interestingly, snorkels can only be effective up to a maximum length of 16 inches.
text: Although snorkels which shield the air portal may be effective in preventing waves of water from flowing into the tube through the air portal, such shields are ineffective when the user intentionally or unintentionally submerges the top of the snorkel and its air portal below the water surface.