Task: Question Answering
Input (English): Problem: a and b are two multiples of 36 , and q is the set of consecutive integers between a and b , inclusive . if q contains 9 multiples of 9 , how many multiples of 4 are there in q ? 
Options: a ) 18 , b ) 19 , c ) 20 , d ) 21 , e ) 22
Output (English): b