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:     Is the lake very polluted ?  
 Person2:  Well , I wouldn't swim in it - but the water is much cleaner than it was a few years ago .  
 Person1:      Are local factories allowed to discharge waste water into the lake ?  
 Person2:  Yes , but it must be treated in an effluent treatment plant first . 

1