answer: #Person2# tells #Person1# it's a coffee grinder.
documents: #Person1#: What's this, I wonder?
  #Person2#: I'm not sure. Let me have a look. . . It could be a coffee grinder.
  #Person1#: A coffee grinder?
  #Person2#: Yes, it must be used for grinding coffee beans.
  #Person1#: Oh, that would be very useful.