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:     Excuse me . Is this the right way to the museum ?  
 Person2:  I'm afraid you're going in the opposite direction . Go back the way you came , and take the second turn on the left . The museum is straight ahead , right in front of you .  
 Person1:      Will it take me long to get there ?  
 Person2:  Well , it's about fifteen minutes ' walk .  
 Person1:      Which bus goes there ?  
 Person2:  You may take a No . 34 bus . And the subway can also take you there .  
 Person1:      Thank you very much .  
 Person2:  My pleasure . 

1