Task: Question Answering
Input (English): Problem: a swimmer can swim in still water at 4 km / h . if the speed of the water current is 1 km / h , how many hours will the swimmer take to swim against the current for 6 km ? 
Options: a ) 1.2 , b ) 1.4 , c ) 1.6 , d ) 1.8 , e ) 2
Output (English): e