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:     Graham , why are you always on the phone with Jane ?  
 Person2:  Because we are partners in our science lab . Why are you so jealous ?  
 Person1:      The other night when you came home there was lipstick on your right cheek . How do you explain that ?  
 Person2:  My aunt Mary just flew in from Cleveland and she laid one right on my right cheek .  
 Person1:      Are you sure ?  
 Person2:  Of course I am . I only love you , Amy .  
 Person1:      Okay , I'm sorry . I believe you .  
 Person2:  Why do you always accuse me like that ?  
 Person1:      Because you are the most handsome boy at the university and I love you so much ! I guess I just go crazy sometimes . That's all .  
 Person2:  Oh , Amy . I am the luckiest guy in the world .  
 Person1:      Why ?  
 Person2:  Because I am loved by the most beautiful girl in the world !  
 Person1:      Oh . Graham . I love you so much and I really believe in our love . 

1