Complex sentence: Mr. Burns and Mayor Quimby work together to build a casino, where Homer gets a job as a blackjack dealer, designed by Mr Burns himself, as the proposals he received were not to his liking.
Split into simpler sentences: Mr. Burns and Mayor Quimby work together to build a casino, where Homer gets a job as a blackjack dealer. The casino is designed by Mr. Burns himself, as the proposals he received were not to his liking.