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 , I wonder ?  
 Person2:  I'm not sure.Let me have a look ... It could be a coffee grinder .  
 Person1:      A coffee grinder ?  
 Person2:  Yes , it must be used for grinding coffee beans .  
 Person1:      Oh , that would be very useful . 

1