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:     Why are those people crying ?  
 Person2:  They must have just come back from tomb sweeping because today is Tomb Sweeping Day .  
 Person1:      Tomb Sweeping Day ? What is it ?  
 Person2:  Tomb Sweeping Day is a traditional festival in China , on which many Chinese mourn the dead .  
 Person1:      What do they do ?  
 Person2:  People go to the cemetery to pay their respects to the dead . 

1