Among the menus sponsored by Pacific Mail Steamship Company, how many menus have no more than 2 pages?
sponsored by Pacific Mail Steamship Company refers to sponsor = 'PACIFIC MAIL STEAMSHIP COMPANY'; no more than 2 pages refers to COUNT(page_number) < = 2;
SELECT COUNT(*) FROM Menu AS T1 INNER JOIN MenuPage AS T2 ON T1.id = T2.menu_id WHERE T1.sponsor = 'PACIFIC MAIL STEAMSHIP COMPANY' GROUP BY T2.menu_id HAVING COUNT(T2.page_number) <= 2