Conversation so far:
what is alternative tentacles?
In June 1979, Biafra co-founded the record label Alternative Tentacles, with which the Dead Kennedys released their first single, California Über Alles“
who did Biafra co-found Alternative Tentacles with?
When his band broke up in 1986, Biafra took over the influential independent record label Alternative Tentacles, which he had founded in 1979 with Dead Kennedys bandmate East Bay Ray.

Question: when was it founded?
Self-contained rewrite: when was Alternative Tentacles founded?