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

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 .'