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:     Mr . : Are you Mary Lin ?  
 Person2:  Yes .  
 Person1:      Mr . : I'm Mr . Rogers , your homeroom teacher .  
 Person2:  Where should I sit ?  
 Person1:      Mr . : Why don't you sit behind Brad ?  
 Person2:  Who's Brad ?  
 Person1:      Mr . : He's that guy in the blue shirt .  
 Person2:  When does the first period begin , by the way ?  
 Person1:      Mr . : As soon as the bell rings after the morning announcement . 

1