Complex sentence: He auditioned for the fifth season of America's Got Talent in Los Angeles, where the three judges, Howie Mandel, Piers Morgan, and Sharon Osbourne, unanimously voted him forward to the next round in Las Vegas.
Split into simpler sentences: He auditioned for the fifth season of America's Got Talent in Los Angeles. The three judges, Howie Mandel, Piers Morgan, and Sharon Osbourne, unanimously voted him forward to the next round in Las Vegas.