Task: Question Answering
Input (English): Problem: two numbers are in respectively 20 % and 50 % more than a third number . the ratio of the two numbers is ? 
Options: a ) 2 : 5 , b ) 1 : 2 , c ) 4 : 5 , d ) 3 : 7 , e ) 5 : 6
Output (English): c