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:     I heard that you went to the concert the day before ? How did you like it ? 
 Person2:  It was terrific.The concert was really a hit.The symphony orchestra was so good that I was completely absorbed in their performance . 
 Person1:      Who was the conductor ? 
 Person2:  Oh , speaking of the conductor , he is indeed a genius.He did a perfect job.His name is Menuhin , a descendent of Russian American immigrants . 
 Person1:      Oh , I learned that he is also a legendary violinist . 
 Person2:  Absolutely right.He gave a performance of Felix Mendelssohn's violin concerto.That caused a sensation.The audience were stunned by his pure tone . 
 Person1:      Obviously you did enjoy the concert . 
 Person2:  Yes , I did . 

1