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 these your text books ? Biochemistry , General Ecology , Botany , Cell Genetics , Molecular Genetics ...  
 Person2:  Yes . I gotta review all of them for the final exam . It is just around the corner .  
 Person1:      Oh , right ! Do you have many exams at the end of each semester ?  
 Person2:  That depends . Some semesters have many , some don't . And some courses don't have exams but only ask for papers . That's easy .  
 Person1:      And when do you prepare for your final exam ?  
 Person2:  Honestly speaking , most students prepare it one month before the exam .  
 Person1:      Really ? You only review your lessons in one month ? Does it work ?  
 Person2:  Of course , it's useful . And it's very crucial to have the copies of teacher's notes , because most questions in the exam are based on them .  
 Person1:      Wow , and all the key points are included in them ? You're so smart !  
 Person2:  But the exam is not as simple as you may imagine . We have to stay up late .  
 Person1:      Do you have the classrooms open for the whole night ?  
 Person2:  Yes , some people even pack up his bed quilt and sleep there . That's a little bit crazy . 

1