Conversation so far:
When was the band Judas Priest formed?
Judas Priest formed in 1969.
Where was the band Judas Priest formed?
Judas Priest formed in 1969 in industrial West Bromwich, in the Black Country.
Who were the founding members of Judas Priest?
Judas Priest was formed by lead vocalist Al Atkins and bassist Brian Bruno Stapenhill, with John Perry on guitars and John Fezza Partridge on drums.

Question: How did the members know each other?
Self-contained rewrite: How did the founding members of Judas Priest know each other?