Task: Question Answering
Input (English): Problem: how many seconds will a 500 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 75 km / hr ? 
Options: a ) 25 , b ) 30 , c ) 99 , d ) 88 , e ) 61
Output (English): a