Complex sentence: In distinguishing original material from added material in derivative works, the Copyright Act supports this focus on separability, where elements of the original work "pervade" a derivative work and are inseparable, the derivative author can claim no copyright protection at all.
Split into simpler sentences: In distinguishing original material from added material in derivative works, the Copyright Act supports this focus on separability. Where elements of the original work "pervade" a derivative work and are inseparable, the derivative author can claim no copyright protection at all.