Pick one

SELECT * FROM gallery2 WHERE topic_id="1278797" UNION SELECT * FROM gallery2 WHERE topic_id="348373" UNION SELECT * FROM gallery2 WHERE topic_id="547686" UNION SELECT * FROM gallery2 WHERE topic_id="1144846" UNION SELECT * FROM gallery2 WHERE topic_id="1219316" UNION SELECT * FROM gallery2 WHERE topic_id="1186856" UNION SELECT * FROM gallery2 WHERE topic_id="268621" UNION SELECT * FROM gallery2 WHERE topic_id="213977" UNION SELECT * FROM gallery2 WHERE topic_id="15872" UNION SELECT * FROM gallery2 WHERE topic_id="1219128" UNION SELECT * FROM gallery2 WHERE topic_id="1114001" UNION SELECT * FROM gallery2 WHERE topic_id="142468" UNION SELECT * FROM gallery2 WHERE topic_id="1089343" UNION SELECT * FROM gallery2 WHERE topic_id="380232" UNION SELECT * FROM gallery2 WHERE topic_id="1064007" UNION SELECT * FROM gallery2 WHERE topic_id="1455676"