Task: Question Answering
Input (English): Problem: a boat takes 19 hours for travelling downstream from point a to point b and coming back to a point c which is at midway between a and b . if the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph , what is the distance between a and b ? 
Options: a ) 180 km , b ) 127 km , c ) 178 km , d ) 188 km , e ) 111 km
Output (English): a