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 ’ s your trip going ?  
 Person2:  Oh I ’ m enjoying myself but it ’ s so hot here  
 Person1:      Isn ’ t London hot in the summer ?  
 Person2:  Well it can be but Shanghai is much warmer than London .  
 Person1:      I see . What about transport ? How does Shanghai compare to London ?  
 Person2:  Actually I think the buses and trains here are more modern .  
 Person1:      And what about the number of people on the streets ?  
 Person2:  Oh , I think Shanghai is much more crowded than London . 

1