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:     My eyes water continuously . Why ?  
 Person2:  Perhaps because of the dirty air .  
 Person1:      What is there in the air ?  
 Person2:  Some poisonous gas .  
 Person1:      I can't believe that the air in this city is so dirty .  
 Person2:  Yes . I think I won't come here again next time .  
 Person1:      So do I .  
 Person2:  We waste a vacation .  
 Person1:      Maybe you are right . 

1