Complex sentence: J.T. agrees and writes the script for "Cleaver", a slasher horror film, from a story by Christopher, working on the film closely with Moltisanti and Carmine Lupertazzi Jr. who is its co-executive producer.
Split into simpler sentences: J.T. agrees and writes the script for "Cleaver", a slasher horror film, from a story by Christopher. He works on the film closely with Moltisanti, Carmine Lupertazzi Jr. who is co-executive producer.