an Entity references as follows:
The Purple Album is the twelfth studio album by British hard rock band Whitesnake. It contains remakes of songs from Deep Purple band lineups Mark III and Mark IV, when Whitesnake lead singer David Coverdale was a member of that band. It was released on 29 April in Japan, 15 May in Europe, 18 May in the UK and 19 May 2015 in the US through Frontiers Records.