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:     Are you an American ? 
 Person2:  Yeah . 
 Person1:      Why don't you speak English ? 
 Person2:  Oh , my mother is a German , so I can speak German . 
 Person1:      Oh , do you like Chinese ? 
 Person2:  Yeah , I'm eager to learn Chinese , but it is too difficult for me . 
 Person1:      I want to study German . Can we exchange lessons ? 
 Person2:  Very Good . I'd like to do that . 
 Person1:      When will we begin ? 
 Person2:  How about tomorrow night ? 
 Person1:      That's all right . 

1