Assertion: trampoline's spring | /r/HasProperty | steel
Facets:
Source sentences:
text: The frame is constructed out of high quality galvanized steel and the springs are also steel.
text: The Springs – on the jumping surface The Steel Frame – on the jumping surface/ jumpers may fall and injure themselves The Ground or obstructions on the ground
text: The frame and springs are steel.
text: The frame is made of high quality steel, and the springs are steel.