sentences:  In 1977, Heil met a dissident artist from communist East Germany, the young Nina Hagen, who was electrifying Berlin's punk world with her powerful operatic voice and genre-defying musical style.Hagen asked Heil to join her band as her keyboardist, co-writer and co-producer and for the next few years Heil honed his craft what became the legendary Nina Hagen Band.After Hagen left the group to pursue a solo career, the remaining band members formed Spliff, one of Germany's most successful rock bands of the 1980s.