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:     Good evening , Mr.Brown .  
 Person2:  Good evening , David.Good evening , Mary.It ' s so good of you both to come .  
 Person1:      It's nice of you to invite us . 

0