Complex sentence: In December 2011, Spielberg confirmed a sequel to his 3D movie will be made and said the book to adapt had been chosen, and that the Thompson detectives will "have a much bigger role".
Split into simpler sentences: In December 2011, Spielberg confirmed a sequel to his 3D movie will be made and said the book to adapt had been chosen. He explained that the Thompson detectives will "have a much bigger role".