This is the definition

SELECT * FROM gallery2 WHERE topic_id="30690" UNION SELECT * FROM gallery2 WHERE topic_id="1541600" UNION SELECT * FROM gallery2 WHERE topic_id="938210" UNION SELECT * FROM gallery2 WHERE topic_id="982526" UNION SELECT * FROM gallery2 WHERE topic_id="609789" UNION SELECT * FROM gallery2 WHERE topic_id="13605" UNION SELECT * FROM gallery2 WHERE topic_id="1008571" UNION SELECT * FROM gallery2 WHERE topic_id="1215017" UNION SELECT * FROM gallery2 WHERE topic_id="1208269" UNION SELECT * FROM gallery2 WHERE topic_id="1825391" UNION SELECT * FROM gallery2 WHERE topic_id="1764905" UNION SELECT * FROM gallery2 WHERE topic_id="407868" UNION SELECT * FROM gallery2 WHERE topic_id="499004" UNION SELECT * FROM gallery2 WHERE topic_id="1050619" UNION SELECT * FROM gallery2 WHERE topic_id="1137371" UNION SELECT * FROM gallery2 WHERE topic_id="340999"