Assertion: box spring's foundation | /r/HasProperty | necessary
Facets:
value: no longer
type: TEMPORAL
Source sentences:
text: Is a box spring or foundation necessary?
text: For example, latex mattresses are heavier than coil and memory foam mattresses so a stronger foundation is needed.
text: Because foundations and box springs are no longer necessary, platform beds are a cost-efficient alternative and require fewer accessories to make an attractive, comfortable sleep setup.