What is the name of the player who won the "man of the match" award in the match on 2008/4/18?
name of player refers to Player_Name; on 2008/4/18 refers to Match_Date = '2008-04-18'
SELECT T2.Player_Name FROM Match AS T1 INNER JOIN Player AS T2 ON T2.Player_Id = T1.Man_of_the_Match WHERE T1.Match_Date = '2008-04-18'