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:     I think I'm going to China this vacation.How about you ?  
 Person2:  Me ? I prefer France .  
 Person1:      I went to France last summer .  
 Person2:  Oh , really ? I went to China last winter ! 

1