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 know what the BBS is ?  
 Person2:  Sure .  
 Person1:      Tell me then .  
 Person2:  BBS means Bulletin Board Service .  
 Person1:      Oh , I see , but what's it used for ?  
 Person2:  A lot of things !  
 Person1:      Tell me in details .  
 Person2:  Okay . BBS , an online service , offers a wide variety of online games , files , one-on-one chat , message areas , private mail , and participate forums .  
 Person1:      Oh , that's great . I want to try later .  
 Person2:  Why not ? 

1