Task: Question Answering
Input (English): Problem: last year , for every 100 million vehicles that traveled on a certain highway , 40 vehicles were involved in accidents . if 2 billion vehicles traveled on the highway last year , how many of those vehicles were involved in accidents ? ( 1 billion = 1,000 , 000,000 ) 
Options: a ) 800 , b ) 900 , c ) 100 , d ) 1000 , e ) 950
Output (English): a