Conversation so far:
Did the group Van der Graaf Generator influence many people?
Van der Graaf Generator have inspired several notable musicians, including Rush, John Lydon, Marc Almond, Graham Coxon, Luca Prodan, Mark E. Smith, John Frusciante, Bruce Dickinson and Julian Cope.
When was the group Van der Graaf Generator popular?
Van der Graaf Generator have generally been commercially unsuccessful outside of early 1970s Italy.
What type of music did the band Van der Graaf Generator perform?
Progressive rock, experimental rock, art rock

Question: Did they ever release any more music?
Self-contained rewrite: Did the band Van der Graaf Generator ever release any more music?