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:     Hey , where's Cindy ?  
 Person2:  She told me that she's got tennis practice today .  
 Person1:      You're Mary , right ?  
 Person2:  How did you know ?  
 Person1:      Cindy told me about you in our gym class .  
 Person2:  I see . Do you live in this neighborhood , too ?  
 Person1:      My house is next door to yours .  
 Person2:  Oh , Cindy did mention you before . You're Alexander Newman .  
 Person1:      Just call me Alex . Alex and Alexander are the same thing . 

1