Write SQL query to solve given problem: Among the episodes aired on April of 2009, how many episodes won an award?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.episode_id) FROM Award AS T1 INNER JOIN Episode AS T2 ON T1.episode_id = T2.episode_id WHERE SUBSTR(T1.year, 1, 4) = '2009' AND T2.air_date LIKE '2009-04%';