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:     Mr . : Please open your books to page 10 . ( To Mary ) Can I help you ?  
 Person2:  I'm sorry that I'm late . I couldn't find the room .  
 Person1:      Mr . : That's alright . It's the first day of school , after all .  
 Person2:  What are we doing ?  
 Person1:      Mr . : I'm asking the class to read page 10 to themselves . Then I'm going to ask some questions about the passage .  
 Person2:  May I have a book ?  
 Person1:      Mr . : Here . Write your name inside the front cover . Remember that you must return the textbook to me at the end of the semester , so keep it in good condition . 

1