John Lennon playing an unreleased song in Denmark in 1970 is going up for auction in Copenhagen this month.The 33-minute recording is being sold by four Danish men who met Lennon when they were teenagers.The Beatles star was spending the winter of 1969-1970 in a small Danish town on the west coast, spending time with wife Yoko Ono’s daughter Kyoko, who was living with her father in Jutland.The audio, which was recorded after a press conference, includes a conversation between the four teenagers,