Complex sentence: Early discussions with Disney about whether the animation or the musical score should come first led to Disney creating the "Silly Symphonies" series of cartoons, where Stalling was allowed to create a score which Disney handed to his animators.
Split into simpler sentences: Early discussions with Disney about whether the animation or the musical score should come first led to Disney creating the "Silly Symphonies" series of cartoons. These cartoons allowed Stalling to create a score which Disney handed to his animators.