answer: #Person1# invites Mark to shop, but Mark has to help Steve take photos. They'll meet for lunch then.
documents: #Person1#: What are your plans for today Mark? Nick and I are going shopping. Do you want to come too?
  #Person2#: Well as a matter of fact. I'm eating Steve. He's writing an article and he's asked me to take some photos for it.
  #Person1#: An article? About What?
  #Person2#: Oh, just People. Anyway, I'm seeing Steve at the zoo at 10.
  #Person1#: Oh. well, let's meet for lunch shall we? How about that sandwich bar we went to on Friday? I'll see you there about 12:30.
  #Person2#: Sounds good. See you.