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:     Did you see who the suspect was ? 
 Person2:  I got a perfect look at the suspect . 
 Person1:      Would you be able to pick him out of a line-up ? 
 Person2:  That'll be easy . 
 Person1:      Please take a careful look at these five men . 
 Person2:  Okay . 
 Person1:      Is the suspect in this line ? 
 Person2:  I see him . 
 Person1:      Which number is he ? 
 Person2:  The suspect is number four . 
 Person1:      Your cooperation is very much appreciated . 
 Person2:  I'm happy to be of assistance . 

1