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:     Why didn't you tell me you had a girlfriend ?  
 Person2:  Sorry , I thought you knew .  
 Person1:      But you should have told me you were in love with her .  
 Person2:  Didn't I ?  
 Person1:      You know you didn't .  
 Person2:  Well , I'm telling you now .  
 Person1:      Yes , but you might have told me before .  
 Person2:  I didn't think you'd be interested .  
 Person1:      You can't be serious . How dare you not tell me you were going to marry her ?  
 Person2:  Sorry , I didn't think it mattered .  
 Person1:      Oh , you men ! You're all the same . 

1