Task: Wrong Candidate Generation
Input (English): Context: I got this 16 GB flash voyager for several months . It has a strange problem now . Every time it only last about 20 second when I plugged in . I could copy and open files during that time , but then I can not access the voyager and everything on the voyager disappeared . 
Question: What sort of problem might this be ? 
Correct Answer: a software error.
Output (English): Human error.