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:     Professor , I've handed in my paper . Did you read it ?  
 Person2:  Yes . You've done a good job . But there's one thing . You should narrow down your topic .  
 Person1:      What about water pollution instead of pollution ?  
 Person2:  Well done ! 

1