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Jerry Garcia co-founded New Riders of the Purple Sage with John Dawson and David Nelson. The band was formed in 1969 and was active until 1975. They released several albums during their time together, including "New Riders of the Purple Sage" (1971), "Second Helping" (1971), and "Anthem" (1973). The band's music was a mix of country, folk, and rock, and they were known for their live performances.