SELECT DISTINCT CONCAT('Image:', i.page_title), CONCAT('Commons:', n.page_title) FROM categorylinks, page AS n, imagelinks INNER JOIN page AS i LEFT JOIN page AS p ON (p.page_namespace, p.page_title) = (4, CONCAT('Featured_picture_candidates/Image:', i.page_title)) WHERE i.page_id = cl_from AND cl_to = 'Featured_pictures' AND p.page_id IS NULL AND il_to = i.page_title AND il_from = n.page_id AND n.page_namespace = 4 AND n.page_title LIKE 'Featured_picture_candidates/%';