Complex sentence: When Mrs. Phillips arrives, Brisbane attempts to pass all the blame on her, but ultimately, he is rejected by a French man named Francois, who says Brisbane's irresponsibility of having a party with an untested security system is a knucklehead move.
Split into simpler sentences: When Mrs. Phillips arrives, Brisbane attempts to pass all the blame on her. But ultimately, he is rejected by a French man named Francois who says Brisbane's irresponsibility of having a party with an untested security system is a knucklehead move.