Group special

SELECT * FROM gallery2 WHERE topic_id="1514455" UNION SELECT * FROM gallery2 WHERE topic_id="1786220" UNION SELECT * FROM gallery2 WHERE topic_id="915333" UNION SELECT * FROM gallery2 WHERE topic_id="1345263" UNION SELECT * FROM gallery2 WHERE topic_id="1388166" UNION SELECT * FROM gallery2 WHERE topic_id="1608562" UNION SELECT * FROM gallery2 WHERE topic_id="446713" UNION SELECT * FROM gallery2 WHERE topic_id="1691280" UNION SELECT * FROM gallery2 WHERE topic_id="340604" UNION SELECT * FROM gallery2 WHERE topic_id="1421268" UNION SELECT * FROM gallery2 WHERE topic_id="569518" UNION SELECT * FROM gallery2 WHERE topic_id="946204" UNION SELECT * FROM gallery2 WHERE topic_id="1478477" UNION SELECT * FROM gallery2 WHERE topic_id="376251" UNION SELECT * FROM gallery2 WHERE topic_id="1029406" UNION SELECT * FROM gallery2 WHERE topic_id="1746404"