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:     What's that book you have under your arm ?  
 Person2:  It's the best seller everyone's been talking about for the last six months .  
 Person1:      How in the world did you get a copy ? I've put a hold on it at the public library for weeks and I'm still waiting my turn .  
 Person2:  I checked it out of the rental library . It only costs five cents a day .  
 Person1:      Is it really worth paying for ?  
 Person2:  I can't tell yet . I haven't got beyond the first chapter .  
 Person1:      If it's any good , I'll buy a copy when it comes out in the pocket edition . 

1