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:     Did you watch TV last night , Rose ?  
 Person2:  Yeah . I saw a science program . It was quite interesting .  
 Person1:      What was it about ?  
 Person2:  Mars . Scientists say there might be water on it .  
 Person1:      If so , we may live there someday .  
 Person2:  I hope so . Did you know the US successfully sent two robotic explorers to Mars last month ?  
 Person1:      Sure . I heard about this on the TV . On January 3rd , 2004 , Explorer Spirit landed near the so-called Guser Crater . And three weeks later , Spirit's twin explorer , Opportunity , landed on Meridian Planum named by scientists .  
 Person2:  Yes . Both have sent back pictures of the planet . And the latter did a better job . 

1