Task: Question Answering
Input (English): Problem: a family consists of two grandparents , two parents , and 3 grandchildren . the average age of the grandparents is 64 years , the average age of the parents is 39 years , and the average age of the grandchildren is 6 years . what is the average age ( in years ) of the family ? 
Options: a ) 31 , b ) 32 , c ) 33 , d ) 34 , e ) 35
Output (English): b