Complex sentence: Luca Brasi holds a gun to the bandleader's head while Don Corleone threatens to have him killed if he doesn't sign the contract the bandleader signs a release for only $1,000 within an hour.
Split into simpler sentences: Luca Brasi holds a gun to the bandleader's head while Don Corleone threatens to have him killed if he doesn't sign the contract. The bandleader signs a release for only $1,000 within an hour.