Complex sentence: They furnish their boxcar with items retrieved from a local dump and come across a dog with a hurt paw later on they name Watch after growling and scaring away someone they heard outside late at night.
Split into simpler sentences: They furnish their boxcar with items retrieved from a local dump and come across a dog with a hurt paw. They later name the dog "Watch" after it growls and scares away someone they heard outside late at night.