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:     Good afternoon , everyone . The experiment is to start at 3 . Have you gone through the instructions ? 
 Person2:  Yes , sir . 
 Person1:      Ok , now some points for attention . First of all , pay attention to safety ... Now , sign your names on the lab record , and after that you can start . If there is any question , just let me know . 
 Person2:  Excuse me , sir . This air compressor doesn't work . 
 Person1:      Have you turned it on ? 
 Person2:  Yes , I have . 
 Person1:      Ok , I will get you another one . 
 Person2:  Thank you . 

1