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:     Mary , do you remember when we met ?  
 Person2:  I won't ever forget it ! I was sitting in the cafeteria all by myself ...  
 Person1:      And I came up and asked to sit by you ...  
 Person2:  Oh , it seems like it was just yesterday . 

1