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:     Bob , did you see our supervisor ? I need him to sign this paper .  
 Person2:  He is in his office , but you'd better choose your words carefully while talking to him .  
 Person1:      What's up ?  
 Person2:  Nothing . But he is in a bad mood today .  
 Person1:      Thanks for the warning .  
 Person2:  That's all right . 

1