CREATE TABLE table_20596 ("Western Title" CLOB, "Chinese Title" CLOB, "Pinyin" CLOB, "Released Date" CLOB, "Genre" CLOB, "Game Modes" CLOB)

What was the released date of Polarium?
SELECT "Released Date" FROM table_20596 WHERE "Western Title" = 'Polarium'
SELECT "Released Date" FROM "table_20596" WHERE "Western Title" = 'Polarium'