Task: Question Answering
Input (English): Problem: excluding stoppages , the speed of a train is 42 kmph and including stoppages it is 36 kmph . of how many minutes does the train stop per hour ? 
Options: a ) 7.5 , b ) 8.5 , c ) 9.5 , d ) 4.5 , e ) 6.5
Output (English): b