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 happened ?  
 Person2:  I don't know .  
 Person1:      Let's stop and have a look .  
 Person2:  Don't waste time .  
 Person1:      I'm curious about that .  
 Person2:  But it's none of our business . 

1