Task: Question Answering
Input (English): Problem: at the end of year x , automobile installment credit accounted for 43 % of all outstanding consumer installment credit . at that time automobile finance companies extended $ 50 billion of credit , or 1 / 4 of the automobile installment credit . how many billion dollars of consumer installment credit was outstanding at that time ? 
Options: a ) 450 , b ) 465.12 , c ) 475 , d ) 500.15 , e ) 200
Output (English): b