Ravel composed little during 1913. He collaborated with Stravinsky on a performing version of Mussorgsky's unfinished opera "Khovanshchina", and his own works were the "Trois poèmes de Mallarmé" for soprano and chamber ensemble, and two short piano pieces, "À la manière de Borodine" and "À la manière de Chabrier". In 1913, together with Debussy, Ravel was among the musicians present at the dress rehearsal of "The Rite of Spring". Stravinsky later said that Ravel was the only person who immediately understood the music. Ravel predicted that the premiere of the "Rite" would be seen as an event of historic importance equal to that of "Pelléas et Mélisande".