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:     And what's your vision ? 
 Person2:  20/350 . 
 Person1:      Mine's 20/20 . Life just isn't fair , is it ? 
 Person2:  Oh , yes , it is . 
 Person1:      What do you mean ? 
 Person2:  You'll find out when we're in the woods and you have to go to the bathroom ... 
 Person1:      They don't have toilets at the campground ? 
 Person2:  Let's just say I'll have it easy ... 

1