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:     Here you are at last ! You're half an hour late , you know .  
 Person2:  I'm awfully sorry to have kept you waiting for so long .  
 Person1:      What happened ?  
 Person2:  My watch stopped and I didn't know . I certainly need to buy a better one . 

0