Complex sentence: They soon collaborated on a thriller set in the museum, entitled Relic, which was made into a number one box office movie by Paramount Pictures starring Penelope Ann Miller, Tom Sizemore, and Linda Hunt.
Split into simpler sentences: They soon collaborated on a thriller set in the museum, entitled "Relic". It was subsequently made into a motion picture by Paramount Pictures starring Penelope Ann Miller, Tom Sizemore, and Linda Hunt.