Complex sentence: Poulenc composed his "Valse en ut" for "L'Album des Six" (1920) and also contributed to "Les mariés de la tour Eiffel" (1921) with "Discours du Général" and "La Baigneuse de Trouville".
Split into simpler sentences: Poulenc composed his "Valse en ut" for "L'Album des Six" (1920). He contributed to "Les mariés de la tour Eiffel" (1921) with "Discours du Général" and "La Baigneuse de Trouville".