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:     Ah , Oh ! Are you hurt ?  
 Person2:  I don't think so . I'm just shaken up a little .  
 Person1:      Maybe I'd better call an ambulance .  
 Person2:  No , don't bother . I think I'm OK .  
 Person1:      Are you sure ?  
 Person2:  Yes , it's OK . 

1