Conversation so far:
what was some of John Butler earliest works?
Some of John Butler's ealriest work was with a band called Vitamin.
Did John butler ever go back to his band Vitamin?
John Butler formed The John Butler Trio in 2009
did John Butler ever marry or have children?
John Butler is married to Danielle Caruana. They have two children.
Did John Butler ever tour in the united states?
John Butler toured in the United States in 2013.
where there any conflicts with John Butler's  band the John Butler Trio?
The John Butler Trio members began with a blank songwriting slate, rather than using the initial ideas of Butler that had been introduced.
did John Butler ever retire from music?
John Butler is still active in the music industry.

Question: how long was his career?
Self-contained rewrite: how long was John Butler's career?