Assertion: camel's nostril | /r/HasProperty | closed by muscular valves
Facets:
value: fully
type: MANNER
value: to keep out the sand
type: PURPOSE
Source sentences:
text: Their eyes have long lashes which protect them from the stinging, blinding, wind-blown sand; the nostrils can be fully or partly closed by the muscular valves to keep out the sand, and the animals are able to go without water for several days.