Looks like I'm a little bit stuck, could you help me out?

SELECT * FROM gallery2 WHERE topic_id="642627" UNION SELECT * FROM gallery2 WHERE topic_id="299251" UNION SELECT * FROM gallery2 WHERE topic_id="1725785" UNION SELECT * FROM gallery2 WHERE topic_id="288379" UNION SELECT * FROM gallery2 WHERE topic_id="369257" UNION SELECT * FROM gallery2 WHERE topic_id="419522" UNION SELECT * FROM gallery2 WHERE topic_id="690629" UNION SELECT * FROM gallery2 WHERE topic_id="474107" UNION SELECT * FROM gallery2 WHERE topic_id="599398" UNION SELECT * FROM gallery2 WHERE topic_id="30137" UNION SELECT * FROM gallery2 WHERE topic_id="1247879" UNION SELECT * FROM gallery2 WHERE topic_id="1290571" UNION SELECT * FROM gallery2 WHERE topic_id="1302415" UNION SELECT * FROM gallery2 WHERE topic_id="204216" UNION SELECT * FROM gallery2 WHERE topic_id="507539" UNION SELECT * FROM gallery2 WHERE topic_id="878465"