Conversation so far:
What were The Angels doing in the 1970s?
In November 1970, they formed the Moonshine Jug and String Band, an acoustic ensemble, in Adelaide.
Who were the Angels members of the band at in the 1970s?
John Brewster and his brother Rick.

Question: Besides Bewster, who else?
Self-contained rewrite: Besides Bewster, who else joined the Angels band in the 1970s?