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HAMBURG, GERMANY - APRIL 16: Keith Emerson from Emerson Lake And Palmer performs live on stage at Ernst Merck Halle in Hamburg, Germany on April 16 1973 (Photo by Ellen Poppinga - K & K/Redferns)

HAMBURG, GERMANY - APRIL 16: Keith Emerson from Emerson Lake And Palmer performs live on stage at Ernst Merck Halle in Hamburg, Germany on April 16 1973 (Photo by Ellen Poppinga - K & K/Redferns)