answer: #Person1# helps #Person2# look for books on WTO.
documents: #Person1#: Can I help you?
  #Person2#: I'm looking for books on WTO. Could you show me where they are?
  #Person1#: Come this way please. We'Ve got plenty of them and they're all on the shelf near the cashier's desk.
  #Person2#: Thanks a lot.
  #Person1#: You're welcome.