Conversation so far:
What year did the band, Deep Purple split up?
The end of Deep Purple came on tour in England on 15 March 1976 at the Liverpool Empire Theatre.
Why did the band, Deep Purple split up?
At this time in 1976, as he admitted in interviews years later, Glenn Hughes was suffering from a cocaine addiction. After several below-par concert performances, the band was in danger.

Question: Who said speak for yourself?
Self-contained rewrite: Who said, Speak for yourself from the band, Deep Purple?