Assertion: heavy metal's sound | /r/HasProperty | codified in 1970
Facets:
value: by led zeppelin
type: OTHER
value: by black sabbath
type: OTHER
value: by deep purple
type: OTHER
Source sentences:
text: The new sound was codified in the 1970s by Led Zeppelin, Deep Purple, and Black Sabbath with the release of Led Zeppelin II, Deep Purple in Rock, and Paranoid, respectively, which featured heavy riffs, distorted “power chords,” mystical lyrics, guitar and drum solos, and vocal styles that ranged from the wails of Zeppelin’s Robert Plant to the whines of Sabbath’s Ozzy Osbourne.