Question: Exodus is an American thrash metal band formed in 1979 in Richmond, California, their current lineup, includes Gary Wayne Holt, an American guitarist from the San Francisco Bay Area, and is also a guitarist for the American thrash metal band Slayer, in which he took over duties for original guitarist Jeff Hanneman, who died in which year?
Sentence (from "Exodus (American band)"): Holt joined the band about two years after its formation, and is the only member of Exodus to appear on all their releases.
Relevant evidence: No