Original: Three years later, Jaurès, Allemane and the possibilists founded the possibilist French Socialist Party, which supported participation in government, while Guesde and Vaillant formed the Socialist Party of France, which opposed such cooperation.
Simplified: Three years later, Jaurès, Allemane and the possibilists founded the French Socialist Party while Guesde and Vaillant formed the Socialist Party of France.