Assertion: liquefied petroleum gas | /r/HasProperty | covered by sheltering canopy
Facets:
value: often
type: TEMPORAL
Source sentences:
text: This is why bottled gas (propane and butane mixtures) used in homes are often covered by a sheltering canopy, and why, in some southern desert areas, propane is transferred from the storage containers to tractor fuel tanks only at night, when the temperature is lower.