Task: Question Answering
Input (English): Problem: a , b and c rents a pasture for rs . 638 . a put in 12 horses for 8 months , b 16 horses for 9 months and 18 horses for 6 months . how much should c pay ? 
Options: a ) 270 , b ) 198 , c ) 676 , d ) 156 , e ) 122
Output (English): b