answer: #Person1# requests Mister Green to teach #Person1#'s class. Mister Green agrees and wants to attend the lecture given by #Person1#'s mother who is quite an expert in language teaching.
documents: #Person1#: Mister Green can you teach my class for me? I have to run to the airport and pick up my mother. My father called just a minute ago to let me know.
  #Person2#: No problem. Your mother is a professor right?
  #Person1#: Yes. That's right. You have a good memory. She's coming to give a lecture on language teaching in the New York University Library at 5:00 PM this Friday. Thanks very much for taking my class, I was going to start the students on a new lesson, lesson 13. You can teach it however you like.
  #Person2#: Great, by the way I'd love to attend your mom's lecture since she's quite an expert in language teaching. I don't have any classes after 3:00 PM on weekdays, so do you mind if I go with you?
  #Person1#: Of course not.