Complex sentence: Chester Wooley (Lou Costello) and Duke Egan (Bud Abbott) are traveling salesmen, who make a stopover in Wagon Gap, Montana while enroute to California.
Split into simpler sentences: Chester Wooley (Lou Costello) and Duke Egan (Bud Abbott) are two travelling salesmen. They make a stopover in Wagon Gap, Montana, while on their way to California.