Assertion: mattress | /r/HasAspect | a layer of foam
Facets:
value: above the air chambers
type: LOCATION
value: for added cushioning
type: PURPOSE
Source sentences:
text: Mattresses may have a layer of foam above the air chambers for added cushioning, and may be enclosed in a cover.
text: Mattresses may have a layer of foam above the air chambers for added cushioning, and may be enclosed in a cover.