Assertion: hip hop's artist | /r/CapableOf | start to receive radio airplay
Facets:
value: by the end of the 1970s
type: TEMPORAL
Source sentences:
text: By the end of the 1970s, artists such as Kurtis Blow and The Sugarhill Gang were just starting to receive radio airplay and make an impact far outside of New York City, on a national scale.