Task: Wrong Candidate Generation
Input (English): Context: I get to class today , paper proudly in hand to realize .... that the due date was pushed back till Thursday , only I forgot to make the change in the calendar on my phone . Sigh . Oh , well . 
Question: Why may the due date of the paper have been pushed back ? 
Correct Answer: The paper was more difficult than initially thought .
Output (English): The teacher had a scheduling issue .