Task: Question Answering
Input (English): Problem: how many seconds will a 500 meter long train moving with a speed of 63 km / hr , take to cross a man walking with a speed of 3 km / hr in the direction of the train ? 
Options: a ) 15 s , b ) 20 s , c ) 25 s , d ) 30 s , e ) 35 s
Output (English): d