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:     How do you like this waltz ?  
 Person2:  It's very nice . I like it very much .  
 Person1:      Well , then , may I invite you for the first dance ?  
 Person2:  My pleasure . But I'm afraid I'm not much of a dancer , and I suppose you dance often .  
 Person1:      Me ? Oh , no . In fact , I only took up dancing quite recently .  
 Person2:  Oh , really ? But you're doing the waltz wonderfully well .  
 Person1:      I'm glad you say so . You dance beautifully too . It's lucky that I got you as a partner .  
 Person2:  Thank you for your compliments . It's just you are a good leader . Do you like the foxtrot and tango ?  
 Person1:      Yes . And what dances do you like best ?  
 Person2:  Disco is my favorite . I like it better than any other dances because it can release one's hidden feelings , and is a healthy exercise . But I don't do the rock and roll nor break-dancing .  
 Person1:      Oh , well , the music has stopped . Thank you for the dance .  
 Person2:  My pleasure . 

1