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:     So John , have you ever been to China before ? 
 Person2:  No , I haven ’ t . This is the first time I have been to China . 
 Person1:      Have you travelled to many other countries ? 
 Person2:  To be honest , I have never been to an Asian country before but I have visited many countries in Europe . 
 Person1:      What about America ? Have you ever been to the United States ? 
 Person2:  Actually , I haven ’ t been to the states but I have been to Canada . 

1