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:     Did Roll win the race ?  
 Person2:  Yeah , he did . But he only won it by a hair's breadth .  
 Person1:      But anyway , he won at last .  
 Person2:  Yeah . To win is the most important thing . 

1