Complex sentence: Posing as a married couple, Sam and Lila check into the motel and search Marion's room, where they find a scrap of paper in the toilet with "$400,000" written on it.
Split into simpler sentences: Posing as a married couple, Sam and Lila check into the motel and search Marion's room. They find a scrap of paper in the toilet with "$400,000" written on it.