Task: Wrong Candidate Generation
Input (English): Context: DENTIST : We ca n't take it out while it 's infected . ME : Actually , while it 's infected is exactly the time you should be taking it out ! If it was n't infected , I 'd be willing to keep it !. 
Question: Why ca n't the tooth be extracted ? 
Correct Answer: Because the tooth is infected .
Output (English): Because the tooth is impacted .