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 your hobby ?  
 Person2:  Photograph .  
 Person1:      What's the make of your camera ?  
 Person2:  Olympus .  
 Person1:      Do you own your own darkroom ?  
 Person2:  No , usually I get my films developed at a photo studio , but I make my own enlargements .  
 Person1:      Why ?  
 Person2:  Because I can make many different kinds of pictures from one negative . That's more , but that saves money . 

1