Task: Question Answering
Input (English): Problem: in a mayoral election , candidate x received 1 / 3 more votes than candidate y , and candidate y received 1 / 7 fewer votes than z . if z received 21,000 votes how many votes did candidate x received ? 
Options: a ) 18000 , b ) 22000 , c ) 24000 , d ) 26000 , e ) 32000
Output (English): c