answer: May tells #Person1# that it's a panda in a cage. #Person1# likes pandas best and knows a lot about them.
documents: #Person1#: May, look, what's that in the cage? 
  #Person2#: Don't you know that? It's panda. 
  #Person1#: Of course I know. I just can't see it very well. 
  #Person2#: OK, then put on your glasses, and do you know what does the panda eat? 
  #Person1#: Of course, Bamboo! 
  #Person2#: That's right. 
  #Person1#: I also know they are given to other countries as gifts for friendship. 
  #Person2#: You sound quite knowledgeable. 
  #Person1#: Not really, panda is my favorite animal. 
  #Person2#: Actually, it likes milk too. 
  #Person1#: Any way, in a word, panda is our friend. 
  #Person2#: Do you know other famous animals in the world? 
  #Person1#: Yeah, let me think, the kangaroo and koala bear from Australia are very famous. 
  #Person2#: That's right. OK, let's move on.