Assertion: microphone's use | /r/HasProperty | the introduction of the song
Facets:
value: by the beatles
type: OTHER
value: according to allmusic's richie unterberger
type: OTHER
Source sentences:
text: According to AllMusic's Richie Unterberger, the very first use of feedback on a commercial rock record is the introduction of the song "I Feel Fine" by the Beatles, recorded in 1964.