Assertion: trampoline's frame | /r/MadeOf | steel
Facets:
value: most often
type: DEGREE
value: to ensure the user's stability
type: PURPOSE
Source sentences:
text: The frame of a competitive trampoline is made of steel and can be made to fold up for transportation to competition venues.
text: It has a rugged frame that is made of steel and a safety pad to ensure the user's stability.
text: Frame Material: The frame of a trampoline is most often made of steel, with some smaller versions of kids trampolines made from hard plastic.