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:     Do you hear what happened to Sally ?  
 Person2:  No , what ?  
 Person1:      She had to go to the hospital .  
 Person2:  Why ?  
 Person1:      She passed out in class . Seems she hadn't eaten anything in days .  
 Person2:  Why on earth would she do that ? You mean that she intentionally did not eat any food for days ? That's crazy !  
 Person1:      Yeah , but that's what she did .  
 Person2:  I can't believe that there are girls who are willing to do that to their bodies . And all for a certain look .  
 Person1:      Well , it's not just the girl ’ s fault . It's also society's fault - magazines and ads that show - thin models all saying , It's in to be thin . It's hard for them not to listen .  
 Person2:  True , but there are limits . Being thin is one thing ; starving oneself to death is another . No one forces them to do this . 

1