Write SQL query to solve given problem: How many pages are there in the "Emil Kuehn" menu?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT SUM(CASE WHEN T1.name = 'Emil Kuehn' THEN 1 ELSE 0 END) FROM Menu AS T1 INNER JOIN MenuPage AS T2 ON T1.id = T2.menu_id