answer: #Person1# says that there is a tornado warning on, which means that a tornado has been seen somewhere in southern Wisconsin. #Person1# explains to #Person2# the two stages of a tornado. The first is a 'tornado watch' and the second is a 'tornado warning'. #Person1# also indicates that not so many people die in tornadoes, but a lot of houses are destroyed sometimes.
documents: #Person1#: There is a tornado warning on. My mother just told me she heard it on the radio.
  #Person2#: What is a tornado warning?
  #Person1#: It means that a tornado has been seen somewhere in the area.
  #Person2#: Really? In New Berlin?
  #Person1#: No. Not necessarily in town. But in southern Wisconsin somewhere. A tornado has been spotted. They have two stages here. This is what is called a ' tornado watch. ' That means that the weather conditions are perfect for a tornado.
  #Person2#: I understand. They think a tornado might come.
  #Person1#: Yes. People should look out, because maybe there will be tornadoes coming. So it's called a ' watch. '
  #Person2#: And the second stage is called a ' tornado warning '.
  #Person1#: Yes. If a tornado has been spotted, they announce a ' tornado warning '. So if there's a tornado warning on, it means a tornado is out there somewhere.
  #Person2#: It's scary.
  #Person1#: Well. Tornadoes can be dangerous, it's true. If we hear something like a loud train coming, then we have to go in the basement.
  #Person2#: What do you mean ' a loud train '?
  #Person1#: That is what tornadoes sound like. They sound like trains. They're very loud.
  #Person2#: But if you hear them coming, isn't it already too late?
  #Person1#: Maybe. It depends on the tornado. Some can move across the ground at 200 miles an hour. That is very fast. Others aren't so fast.
  #Person2#: Have you seen a lot of them?
  #Person1#: I've only seen one in my life. I was looking out the window. It was around two miles away. It was very interesting to watch. But it was heading toward my friend's house. So I quickly called them on the phone.
  #Person2#: Did it hit their house?
  #Person1#: No, it didn't. But they are glad I called them.
  #Person2#: What were they doing when you called?
  #Person1#: They were all sitting in the living room watching TV. They had no idea a tornado was coming toward their house. If it had hit them, they could have all been killed.
  #Person2#: That's terrible. Do many people die in tornadoes?
  #Person1#: Not so many really. But a lot of houses are destroyed sometimes.