Task: Question Answering
Input (English): Problem: a man whose bowling average is 22.2 , takes 4 wickets for 36 runs and thereby decreases his average by 1.2 . the number of wickets , taken by him before his last match is : 
Options: a ) 14 , b ) 22 , c ) 38 , d ) 40 , e ) 50
Output (English): d