answer: Jane and #Person1# are watching birds on the lake. #Person1# tells Jane about #Person1#'s friend's experience of being bitten by a big bird.
documents: #Person1#: Hi, Jane. Look at all the birds on the lake.
  #Person2#: Wow, there are a lot of birds. They're far more active than those at the zoo.
  #Person1#: They're pretty, but be careful of them. My friend was bitten by a big bird once. And it really hurt.
  #Person2#: What? How could that happen?
  #Person1#: He was feeding some larger birds in a park, and one of them got angry and bit him. He should have stayed around the ducks.
  #Person2#: Why is that? Is it because ducks eat less?
  #Person1#: No, ducks are just nicer, and they don't attack you if you stop feeding them.