Original sentence: 1981 - November 4-5: In the "Night of the Long Knives" (French: "La Nuit des Longs Couteaux"), Pierre Trudeau makes a constitutional deal with nine anglophone provinces without Quebec
Edited sentence: 1981 - November 4-5: In the "Night of the Long Knives" (French: "La Nuit des Longs Couteaux"), Pierre Trudeau makes a constitutional deal with nine anglophone provinces behind Quebec's back