Task: Wrong Candidate Generation
Input (English): Context: They are able to travel up and down the country on a regular basis but again they have no guarantee of a having return loads . There are too many vehicles on the road which are being run inefficiently and without back loads . For the first Christmas ever internet shopping has overtaken the high street . 
Question: Why is it inefficient to run vehicles without back loads ? 
Correct Answer: There is no return load on the semi truck .
Output (English): Carrying something back to someone is unstable.