Assertion: antenna tv | /r/HasProperty | available
Facets:
value: to american tv broadcasters
type: TRANSITIVE-OBJECT
value: since 1952
type: TEMPORAL
Source sentences:
text: While UHF-TV has been available to American TV broadcasters since 1952, affiliates of the four major American TV networks (NBC, CBS, ABC, and DuMont) continued to transmit primarily on VHF wherever they were available.