answer: Susan asks Janice to help her find a document. Janice cannot find it anywhere until Susan reminds her that it might be in Nova's files.
documents: #Person1#: Janice, I can't find the document I was working on last month. Can you help me to look for it?
  #Person2#: Susan, I'm sorry. Did you look up those files I requested?
  #Person1#: Yes, but I still can not find it. Maybe it is in this cabinet.
  #Person2#: I couldn't find the files you request, even though I checked all the cross-references. I don't think it's there.
  #Person1#: I am sure that document was filed.
  #Person2#: Well, let me check again under a different heading.
  #Person1#: Good idea! It seems that I asked you to put it in Nova's files.
  #Person2#: Maybe that's why I couldn't find it. All the documents on Nova are filed under ' V '.