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:     Who did the stupid thing ?  
 Person2:  Maybe it was Dick .  
 Person1:      I don't think so . Dick has been on the ball and he never does things like that .  
 Person2:  Then it must be a naughty boy who did it . 

1