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:     Guess what ! I know something you don't know !  
 Person2:  What's that ?  
 Person1:      How many planets are there in the solar system ?  
 Person2:  That's easy . Everyone knows that there are nine .  
 Person1:      Not anymore ! Can you believe it ? They've decided that Pluto is not a planet anymore !  
 Person2:  Nice try . I wasn't born yesterday , you know .  
 Person1:      I'm dead serious . They've decided that it's too small to be a planet , but actually they haven't yet agreed on how big something has to be in order to be a planet anymore .  
 Person2:  That sounds crazy . But they can't just change their mind about things like that .  
 Person1:      Yes , they can . If you remember correctly , people used to believe that the world was flat .  
 Person2:  I suppose you're right . They also used to think that they were so important that the sun revolved around them , not the other way around .  
 Person1:      We actually know relatively little about space and the cosmos .  
 Person2:  Do you think that we'll one day be able to travel to another planet for a vacation ?  
 Person1:      I suppose we could actually live on a planet outside of the milky way .  
 Person2:  Do you think we'll ever get to meet an alien from outer space ?  
 Person1:      I hope not . I think they would be a threat to those of us that lived on the Earth .  
 Person2:  You're so old-fashioned . That's what people used to think about people from another country !  
 Person1:      Point taken . Hopefully one day , we'll live in an interplanetary society . 

0