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 ’ ll sing you a song . 
 Person2:  Yes , sing a song . But don ’ t sing a sad song . 
 Person1:      Most of my songs are sad , sorry . 
 Person2:  Well , please sing one that ’ s not sad . 
 Person1:      OK , I ’ ll sing San Francisco then . 

0