Task: Question Answering
Input (English): Problem: a train passes a station platform in 50 sec and a man standing on the platform in 20 sec . if the speed of the train is 54 km / hr . what is the length of the platform ? 
Options: a ) 615 m , b ) 240 m , c ) 168 m , d ) 300 m , e ) 691 m
Output (English): d