answer: #Person2# thought the lecture is interesting while #Person1# thought the lecturer talked a lot of rubbish.
documents: #Person1#: What did you think of the lecture?
  #Person2#: I thought it was very interesting.
  #Person1#: Did you really?
  #Person2#: Yes, didn't you?
  #Person1#: Certainly not. I thought he talked a lot of rubbish.
  #Person2#: So you think you know more than he does.
  #Person1#: Well, take coal for instance.
  #Person2#: What about it?
  #Person1#: Coal won't become important again.
  #Person2#: Why not?
  #Person1#: It's too dirty. They won't be able to find people to work down coal mines in the future.
  #Person2#: They'll invent new kinds of machinery.
  #Person1#: Nonsense. The only sort of power they'll use in the future is atomic power.