A fun way of outlining it

SELECT * FROM gallery2 WHERE topic_id="78905" UNION SELECT * FROM gallery2 WHERE topic_id="1373757" UNION SELECT * FROM gallery2 WHERE topic_id="958607" UNION SELECT * FROM gallery2 WHERE topic_id="579222" UNION SELECT * FROM gallery2 WHERE topic_id="1009291" UNION SELECT * FROM gallery2 WHERE topic_id="410826" UNION SELECT * FROM gallery2 WHERE topic_id="1283212" UNION SELECT * FROM gallery2 WHERE topic_id="7010" UNION SELECT * FROM gallery2 WHERE topic_id="1807253" UNION SELECT * FROM gallery2 WHERE topic_id="148893" UNION SELECT * FROM gallery2 WHERE topic_id="1809235" UNION SELECT * FROM gallery2 WHERE topic_id="1242343" UNION SELECT * FROM gallery2 WHERE topic_id="170163" UNION SELECT * FROM gallery2 WHERE topic_id="882285" UNION SELECT * FROM gallery2 WHERE topic_id="294873" UNION SELECT * FROM gallery2 WHERE topic_id="1781788"