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:     excuse me , is this the way to the Greta Wall ?  
 Person2:  oh , it is really far from here . You ’ re going in the wrong direction actually .  
 Person1:      I must have taken a wrong turn .  
 Person2:  it doesn ’ t matter . Go back the way you came . After about five kilometers , you ’ ll see a hotel on the side of the road . It ’ s a big one . You can ’ t miss it .  
 Person1:      and then ?  
 Person2:  take the next right . Drive about one click further , and you ’ ll see the entrance of the highway to the Great Wall .  
 Person1:      thanks a lot .  
 Person2:  you ’ re welcome .  
 Person1:      by the way , how long does it take ?  
 Person2:  without traffic , it takes about an hour .  
 Person1:      I heard the Great Wall closes early in the afternoon . Do you think I can make it before closing ?  
 Person2:  yes , I think so . It doesn ’ t close until 5 o ’ clock . You still have plenty of time .  
 Person1:      great ! Thank you !  
 Person2:  my pleasure , and have a good time ! 

1