Give the date of birth of the 2014 Orange Cap winner.
date of birth refers to DOB; 2014 refers to Season_Year = 2014; Orange Cap winner refers to Orange_Cap IS NOT NULL
SELECT T2.DOB FROM Season AS T1 INNER JOIN Player AS T2 ON T1.Man_of_the_Series = T2.Player_Id WHERE T1.Season_Year = 2014 AND T1.Orange_Cap IS NOT NULL