Leo Sidran co-produced "Al Otro Lado Del Rio" for the soundtrack to a movie about what man? 
Leo Sidran: Leo Sidran is a musician, composer, performer, and producer whose credits include co-producing the Oscar-winning song "Al Otro Lado Del Rio" for the soundtrack to the movie "The Motorcycle Diaries". The Motorcycle Diaries (film): The Motorcycle Diaries (Spanish: "Diarios de motocicleta" ) is a 2004 biopic about the journey and written memoir of the 23-year-old Ernesto Guevara, who would several years later become internationally known as the iconic Marxist guerrilla commander and revolutionary Che Guevara.
Ernesto Guevara