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:     Do you like that vintage clock ? It's almost fifty years old .  
 Person2:  Really ? It almost looks brand new . And the color designs are so retro .  
 Person1:      Well , in the fifties , that clock used to be inside a drive-in burger joint .  
 Person2:  No way ! My parents used to hang out at those places .  
 Person1:      This is one of my favorite items .  
 Person2:  How did you get it ? 

1