Task: Question Answering
Input (English): Problem: a person lent a certain sum of money at 6 % per annum at simple interest and in 8 years the interest amounted to $ 520 less than the sum lent . what was the sum lent ? 
Options: a ) 800 , b ) 1000 , c ) 1200 , d ) 1400 , e ) 1600
Output (English): b