Task: Question Answering
Input (English): Problem: a man can buy a new house in 4 years with all of his earnings . but he spend the same amount in household expenses in 8 years and for savings in 12 years . how many time needed for buying the house ? 
Options: a ) 12 , b ) 20 , c ) 30 , d ) 15 , e ) 24
Output (English): e