Task: Question Answering
Input (English): Problem: how many seconds will a 450 m long train take to cross a man walking with a speed of 3 km / hr in the direction of the moving train if the speed of the train is 63 km / hr ? 
Options: a ) 20 , b ) 27 , c ) 42 , d ) 32 , e ) 60
Output (English): b