Complex sentence: In 2015, The Hollywood Vampires was announced as a band, a supergroup featuring Alice Cooper, Paul McCartney, Johnny Depp and Joe Perry, their debut performance will be held at Rock in Rio Festival in Brazil, in September 2015.
Split into simpler sentences: In 2015, The Hollywood Vampires was announced as a band, a supergroup formed by Alice Cooper, Johnny Depp and Joe Perry. Their debut performance will be held at Rock in Rio Festival in Brazil, in September 2015.