Complex sentence: Horner was a member of the band "Earth For Now" (called "Unstable Conditions" in 2011) who played their first show in Hollywood, California, starting the set with "Howl at the Moon".
Split into simpler sentences: Horner was apart of the band "Earth For Now" (Formally called "Unstable Conditions" back in 2011) who played their first show in Hollywood, CA. Starting the set with "Howl at the Moon".