Task: Wrong Candidate Generation
Input (English): Context: Of the other two ( both clipped directly out of the paper ) one scanned with an error , and the other just would n't scan at all . The one that scanned with an error , the coupon was for 2 and I had actually bought 4 . This happens to me a lot when scanning at Walmart and I buy more than the coupon specifies , I get an error . Eventually the person in charge of the U - Scan came over , and I showed him the items for the incorrect scan . 
Question: What will the cashier do after looking at the incorrect scan ? 
Correct Answer: They will call for a supervisor .
Output (English): They will keep the coupon .