sentences:  His appearance was well received, and he was given "thunderous applause", even though critics noted that the performance was uneven.Phil sang backup for Roy Wood's 1975 album "Mustard" and two songs for Warren Zevon's 1976 self-titled album.While Zevon was part of Phil Everly's back-up band, Phil also suggested the title and subject matter for Zevon's breakthrough hit single "Werewolves Of London".