CREATE TABLE table_41311 ("Album" TEXT, "Release date" TEXT, "Label" TEXT, "Format" TEXT, "Covered Song" TEXT, "Original Song" TEXT)

What is the Release date for the Covered Song named ' sign o' the times ' by prince .?
SELECT "Release date" FROM table_41311 WHERE "Covered Song" = ' sign o'' the times " by prince .'
SELECT "Release date" FROM "table_41311" WHERE "Covered Song" = ' sign o\' the times " by prince .'