Task: Wrong Candidate Generation
Input (English): Context: Due to the strain this put on my neck and my head , I woke up with a migraine . A couple years back this could have been avoided . A couple of years back NyQuil did exactly what it 's commercials said it would do and helped you get your zzz 's . 
Question: What may be the reason Nyquil no longer does what it 's supposed to do ? 
Correct Answer: They 've done something to change it and now it does not work the same .
Output (English): Nyquil was bought out by a migraine company and they no longer sell it .