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:     What's this city famous for ?  
 Person2:  Tea and silk .  
 Person1:      Where can we have the famous tea ?  
 Person2:  Preferably at the big department stores .  
 Person1:      Thank you . 

1