Assertion: iconic riff | /r/HasProperty | the most recognizable one
Facets:
value: in "heavy rock" history
type: LOCATION
value: usually
type: DEGREE
Source sentences:
text: In 1973, Deep Purple released the song "Smoke on the Water", with the iconic riff that's usually considered as the most recognizable one in "heavy rock" history, as a single of the classic live album Made in Japan.