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:     You have been here for how long ? Four months now ?  
 Person2:  Yeah , about .  
 Person1:      Do you know Chinese better now ?  
 Person2:  Oh , definitely . I remember , when I first arrived in Guangzhou , my girlfriend was haggling with a sales clerk over the price of a mobile phone .  
 Person1:      Oh , yeah . Many Chinese like to bargain . It happens almost everywhere .  
 Person2:  I mean , I understand that . But the speed of the conversation got faster and faster , until it seemed to me that they would fight . My perception of the tone was that it was a violent shouting match . The truth was that it was a perfectly normal conversation .  
 Person1:      A shouting match ? You ’ re so funny . You must be exaggerating . I don ’ t believe it .  
 Person2:  I am not exaggerating at all . I ’ m telling you the truth . That was how I felt at that time .  
 Person1:      Yes , perhaps . Chinese usually don ’ t notice that sort of thing . Maybe it ’ s quite natural to us .  
 Person2:  Yes , absolutely true . 

1