Task: Question Answering
Input (English): Problem: a can build a wall in the same time in which b and c together can do it . if a and b together could do it in 25 days and c alone in 35 days , in what time could b alone do it ? 
Options: a ) 275 days , b ) 178 days , c ) 185 days , d ) 175 days , e ) 675 days
Output (English): d