Complex sentence: He changed his name to Terence Hill the same year, a name made up as a publicity stunt by the film producers; he had to choose from a list of twenty names and picked the one with his mother's initials.
Split into simpler sentences: He changed his name to Terence Hill the same year. The name was made up as a publicity stunt by the film producers; he had to choose from a list of twenty names and picked the one with his mother's initials.