an Entity references as follows:
"Hallelujah" is a song by British hard rock group Deep Purple, released in 1969. It is the first single to feature singer Ian Gillan and bassist Roger Glover and released in-between their 1969 eponymous album and the live Concerto for Group and Orchestra. The B-side was an edit of the instrumental album track "April". The track was recorded on 7 and 12 June 1969. At the time, Glover had not yet joined the band and played on the track as a session musician.