I think I know where you would put it 😉

SELECT * FROM gallery2 WHERE topic_id="1431472" UNION SELECT * FROM gallery2 WHERE topic_id="116156" UNION SELECT * FROM gallery2 WHERE topic_id="100351" UNION SELECT * FROM gallery2 WHERE topic_id="1814874" UNION SELECT * FROM gallery2 WHERE topic_id="437349" UNION SELECT * FROM gallery2 WHERE topic_id="1178539" UNION SELECT * FROM gallery2 WHERE topic_id="593286" UNION SELECT * FROM gallery2 WHERE topic_id="285711" UNION SELECT * FROM gallery2 WHERE topic_id="853251" UNION SELECT * FROM gallery2 WHERE topic_id="215190" UNION SELECT * FROM gallery2 WHERE topic_id="1473714" UNION SELECT * FROM gallery2 WHERE topic_id="1481289" UNION SELECT * FROM gallery2 WHERE topic_id="738890" UNION SELECT * FROM gallery2 WHERE topic_id="833829" UNION SELECT * FROM gallery2 WHERE topic_id="1353077" UNION SELECT * FROM gallery2 WHERE topic_id="1091324"