Question: International outlaw motorcycle club, Rock Machine, was formed in what year by a former friend of the worldwide one-percenter motorcycle club whose members typically ride Harley-Davidson motorcycles, Hells Angels?
Sentence (from "Blue Angels Motorcycle Club"): The Blue Angels Motorcycle Club (BAMC) is a one-percenter motorcycle club that was formed by Allan Morrison and Billy Gordon in the Maryhill area of Glasgow, Scotland in 1963.
Relevant evidence: No