Complex sentence: When operating under Swiss owenership the locomotives have received the class "Am 842", several units owned by the "Société Nationale des Chemins de Fer Luxembourgeois" are classified as CFL class 1100.
Split into simpler sentences: When operating under Swiss owenership the locomotives have received the class Am 842. Also, several units owned by the "Société Nationale des Chemins de Fer Luxembourgeois" are classified as CFL class 1100.