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:     So how did you meet Bill ?  
 Person2:  I met him through a computer bulletin board .  
 Person1:      Oh , really ? Which bulletin board ?  
 Person2:  It was one I used down at the local coffee house called the San Francisco Net . It's been around since around 1991 .  
 Person1:      I've heard about that , but I've never tried it .  
 Person2:  You ought to . One dollar buys you 15 minutes of computer time . A Chat session links you with cappuccino sippers in other cafes and also to home computers on the network .  
 Person1:      I have no desire to talk on a network with a bunch of strangers .  
 Person2:  That's the whole point . All your inhibitions disappear because you can ’ t see the other person . This network allows you to talk to people whom you normally wouldn ’ t talk to .  
 Person1:      I just want a private conversation with one other person .  
 Person2:  You can do that . A private session lets two people talk alone . This techno-chat program lets you talk about anything with everybody , without prejudice because you can ’ t see them .  
 Person1:      Well , maybe I'll tag along and watch how you talk .  
 Person2:  That's fine with me , but we'll have to get there early . Because after 8 pm , there is always a long line .  
 Person1:      It ’ s that popular ?  
 Person2:  It sure is . 

1