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:     Would you like this one ?  
 Person2:  I don't think that will do . How about the one at your back ?  
 Person1:      This one ?  
 Person2:  No , the other one ... yes .  
 Person1:      This one is especially built for hard , continuous play . And every detail of workmanship and material has been carefully checked to make it a dependable one for tournament use .  
 Person2:  It do look beautiful . Well . I think I'll take it.Now do you have any racket covers ?  
 Person1:      This cover comes with the racket .  
 Person2:  How much does it come up to ?  
 Person1:      The mark says six hundred yuan , plus tax , it's six hundred and eighty yuan .  
 Person2:  Do you accept credit cards ?  
 Person1:      Sure . If you'll just wait here , I'll be right with you in a minute . 

1