answer: #Person1# and Dr. Green are doing a program. Dr. Green introduces that there're many different kinds of plants and birds in the forest.
documents: #Person1#: So, here we are, deep in the forest. With me is Dr. Green, can you tell us a little about this wonderful place?
  #Person2#: Yes, of course. As you can see, the forest is full of trees, birds and insects.
  #Person1#: Yes, there are strange and beautiful plants everywhere. How many different kinds of plants are there?
  #Person2#: Well, in just one square kilometer of the forest, you can find about 1,500 different kinds of plants and 750 different kinds of trees. And many of them don't grow in any other places of the world.
  #Person1#: Really? Now I'm sure the people listening to this program can hear this unbelievable noise of birds. What's making all the noise?
  #Person2#: Well, of course. The forest is full of living things. You can find about 400 different kinds of birds in just one square kilometer.
  #Person1#: Really? How interesting!