sentences:  The attack took place on 7 May, and consisted of "Prinz Heinrich", "Roon", and "Prinz Adalbert", the elderly coast defense ship , and the light cruisers , , and .They were escorted by a number of destroyers, torpedo boats, and minesweepers.The IV Scouting Group of the High Seas Fleet was detached from the North Sea to provide cover for the operation.