Complex sentence: Homer's new job takes a big part in his life, preventing him from fullfilling his relationship with Marge, even when they take a vacation to a romantic hotel, Carl tells Homer to make reservations for a nuclear power plant convention in Paris.
Split into simpler sentences: Homer's new job takes a big part in his life, preventing him from fulfilling his relationship with Marge. When he and Marge take a vacation to a romantic hotel, they are interrupted as Carl calls Homer and tells him to make reservations for a nuclear power plant convention in Paris.