Help me search for clues

SELECT * FROM gallery2 WHERE topic_id="749995" UNION SELECT * FROM gallery2 WHERE topic_id="853109" UNION SELECT * FROM gallery2 WHERE topic_id="151132" UNION SELECT * FROM gallery2 WHERE topic_id="811485" UNION SELECT * FROM gallery2 WHERE topic_id="1204320" UNION SELECT * FROM gallery2 WHERE topic_id="701877" UNION SELECT * FROM gallery2 WHERE topic_id="418282" UNION SELECT * FROM gallery2 WHERE topic_id="1128551" UNION SELECT * FROM gallery2 WHERE topic_id="290425" UNION SELECT * FROM gallery2 WHERE topic_id="1479872" UNION SELECT * FROM gallery2 WHERE topic_id="1025386" UNION SELECT * FROM gallery2 WHERE topic_id="282507" UNION SELECT * FROM gallery2 WHERE topic_id="1000043" UNION SELECT * FROM gallery2 WHERE topic_id="1641472" UNION SELECT * FROM gallery2 WHERE topic_id="349627" UNION SELECT * FROM gallery2 WHERE topic_id="443090"