Task: Question Answering
Input (English): Problem: walking with 4 / 5 of my usual speed , i arrive at the bus stop 6 minutes later than normal . how many minutes does it take to walk to the bus stop at my usual speed ? 
Options: a ) 20 min , b ) 22 min , c ) 15 min , d ) 18 min , e ) 24 min
Output (English): e