an Entity references as follows:
"Hasta Siempre, Comandante," ("Until Forever, Commander" in English) or simply "Hasta Siempre," is a 1965 song by Cuban composer Carlos Puebla. The song's lyrics are a reply to revolutionary Che Guevara's farewell letter when he left Cuba, in order to foster revolution in the Congo and later Bolivia, where he was captured and killed. The song has been covered numerous times.