Complex sentence: Lah-Lah's repertoire is primarily composed by Mark Harris and Tina Harris as well as writing collaborations with Lilian Harris, Ben Ely of band Regurgitator, Anouk Ely and Kate Johnson.
Split into simpler sentences: Lah-Lah's repertoire is primarily composed by Mark Harris and Tina Harris. Writing collaborators include Lilian Harris, Ben Ely of band Regurgitator, Anouk Ely and Kate Johnson.