who were the original members of quicksilver messenger service?
['David Freiberg – bass, guitar, vocals (1965-1971, 1975, 2006–2019)', 'John Cipollina – guitar (1965-1971, 1975; died 1989)', 'Gary Duncan – guitar, vocals (1965-1969, 1969-1979, 2006-2019; died 2019)', 'Greg Elmore – drums (1965-1979)', 'Jim Murray – guitar, vocals (1965-1967; died 2013)']