Assertion: box spring's foundation | /r/MadeOf | wood
Facets:
value: typically
type: DEGREE
value: usually
type: TEMPORAL
Source sentences:
text: A foundation is typically made of wood and resembles a platform bed with slats going from side to side that provide support.
text: A foundation is a durable flat structure typically made of wood or metal combined with a flat corrugated board on its top.
text: A foundation is usually made of wood and is meant to act as a sturdy support for a wide variety of mattresses, including natural latex, memory foam, and innersprings.