What's under here? Oh help I'm stuck

SELECT * FROM gallery2 WHERE topic_id="875679" UNION SELECT * FROM gallery2 WHERE topic_id="729327" UNION SELECT * FROM gallery2 WHERE topic_id="256311" UNION SELECT * FROM gallery2 WHERE topic_id="257772" UNION SELECT * FROM gallery2 WHERE topic_id="1249562" UNION SELECT * FROM gallery2 WHERE topic_id="881635" UNION SELECT * FROM gallery2 WHERE topic_id="467016" UNION SELECT * FROM gallery2 WHERE topic_id="681523" UNION SELECT * FROM gallery2 WHERE topic_id="685991" UNION SELECT * FROM gallery2 WHERE topic_id="995339" UNION SELECT * FROM gallery2 WHERE topic_id="502825" UNION SELECT * FROM gallery2 WHERE topic_id="1505486" UNION SELECT * FROM gallery2 WHERE topic_id="86910" UNION SELECT * FROM gallery2 WHERE topic_id="608030" UNION SELECT * FROM gallery2 WHERE topic_id="901772" UNION SELECT * FROM gallery2 WHERE topic_id="854205"