Assertion: transistor radio | /r/HasProperty | successful
Facets:
value: extremely
type: DEGREE
value: because of three social forces
type: CAUSE
Source sentences:
text: Transistor radios were extremely successful because of three social forces — a large number of young people due to the post–World War II baby boom, a public with disposable income amidst a period of prosperity, and the growing popularity of rock 'n' roll music.