Task: Question Answering
Input (English): Problem: in a park there are two ponds with both brown ducks and green ducks . in the smaller pond there are 45 ducks and in the larger pond there are 55 ducks . if 20 % of the ducks in the smaller pond are green and 40 % of the ducks in the larger pond are green , then what percentage of ducks are green ? 
Options: a ) 25 % , b ) 27 % , c ) 29 % , d ) 31 % , e ) 33 %
Output (English): d