Complex sentence: In 2000, the Sherman Brothers wrote the song score for Disney's film "The Tigger Movie", marking the brothers' first work for a Disney major motion picture in over twenty eight years.
Split into simpler sentences: In 2000, the Sherman Brothers wrote the song score for Disney's film: "The Tigger Movie" (2000). This film marked the brothers' first major motion picture for the Disney company in over twenty eight years.