Task: Question Answering
Input (English): Problem: there is a point p on the circle . a and b started running in two constant different speeds . a in clockwise and b in anti - clockwise . first time 500 m in clockwise from p then 400 anti - clockwise . if b is yet to complete one round , what is the circumference of the circle ? 
Options: a ) 700 , b ) 800 , c ) 900 , d ) 1000 , e ) 1100
Output (English): a