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:     Bob refused all his classmates ' invitation . 
 Person2:  I really couldn't understand him . 
 Person1:      He is surely a hard nut , nobody likes approaching him . 
 Person2:  We'd better leave him alone . 

0