Complex sentence: That night, Jimmy, Carl and Goddard build another spaceship, which breaks down again, however, after that moment, the kids in town go to Jimmy's backyard and confronts him, thinking he is the one who knows where their parents are.
Split into simpler sentences: That night, Jimmy, Carl, and Goddard build another spaceship, which breaks down again. However after that moment, the kids in town go to Jimmy's backyard and confronts him, thinking he is the one who knows where their parents are.