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:     Where should I sit ? 
 Person2:  Why don't you sit in the back with me ? 
 Person1:      Okay . 
 Person2:  By the way , what's your last name ? I forgot what it is . 
 Person1:      It's Lin . It's spelled L-I-N . 
 Person2:  R-I-N ? 
 Person1:      My pronunciation is not very good . It's L-I-N , Lin . 
 Person2:  I got it . Mary Lin . 
 Person1:      Lin is a common Chinese last name . 

1