From 2011 to 2012, how many Australian players became the "Man of the Match"?
From 2011 to 2012 refers to Match_Date between '2011%' and '2012%'; Australian players refers to Country_Name = 'Australia'
SELECT SUM(CASE WHEN T1.Match_Date BETWEEN '2011%' AND '2012%' THEN 1 ELSE 0 END) FROM `Match` AS T1 INNER JOIN Player AS T2 ON T2.Player_Id = T1.Man_of_the_Match INNER JOIN Country AS T3 ON T3.Country_Id = T2.Country_Name WHERE T3.Country_Name = 'Australia'