Assertion: radio | /r/HasProperty | build using same idea
Facets:
value: because of low cost
type: CAUSE
value: because of the simplicity
type: CAUSE
Source sentences:
text: BC (medium wave/"AM") only radios like the "All American 5" design, and later AM/FM radios with more tubes, and even televisions were build using the same idea, because of the simplicity and low cost possible.