Complex sentence: The Harp Concerto by Alberto Ginastera was premiered in 1965 by the Spanish harpist Nicanor Zabaleta and the Philadelphia Orchestra, conducted by Eugene Ormandy.
Split into simpler sentences: The Harp Concerto by Alberto Ginastera was premiered in 1965. It was premiered in 1965 by the Spanish harpist Nicanor Zabaleta and the Philadelphia Orchestra, conducted by Eugene Ormandy.