Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. If the conversation begins with a question, label it '1' otherwise '0'.
Input:  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 . 

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