Assertion: diver's rebreather | /r/HasProperty | sheltered in use
Facets:
value: from sunlight
type: TRANSITIVE-OBJECT
value: to prevent the rubber
type: PURPOSE
Source sentences:
text: A rebreather which uses rubber counterlungs which are not in an enclosed casing should be sheltered from sunlight when not in use, to prevent the rubber from perishing due to ultraviolet light.