Complex sentence: After the meeting, Vito tells Tom Hagen that Tattaglia is a "pimp" and never could have outfought Sonny and reveals that he realized at the meeting that Barzini is the mastermind behind the war and Sonny's assassination.
Split into simpler sentences: After the meeting, Vito tells Tom Hagen that Tattaglia is a "pimp" and never could have outfought Sonny. He realized at the meeting that Barzini was the mastermind behind the war and Sonny's assassination.