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 opinion about childless couples ? Will you choose to have no kids ? 
 Person2:  to be honest , I wouldn't . 
 Person1:      why ? Do you have to make a choice now ? 
 Person2:  not really . But it has puzzled me for a long time . 
 Person1:      what's the puzzle ? 
 Person2:  my husband and I prefer to have no kids , but my mother-in-law is very traditional and wants grandkids . 
 Person1:      oh , I see . I think the older generation tend to think in a different way . 
 Person2:  yes . It seems she can never accept a childless marriage . We had a fight last night . 
 Person1:      oh , really ? Maybe she is just eager to see her grandchildren . 
 Person2:  but it's absolutely our own business to have a child or not . 
 Person1:      definitely . 
 Person2:  you know , I often overhear our neighbor , the young couple , fighting about how to raise their kid and I really don't want kids to spoil our happiness . 
 Person1:      don't worry . I think in most cases , children are the glue that keeps a family together . 
 Person2:  I guess you're right . But I still prefer to have no child . 
 Person1:      sure . You can fully enjoy your time together . 

1