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:     What did you do over the weekend ?  
 Person2:  I went a global warming rally . It was fantastic to be around so many people who care about the environment .  
 Person1:      Do you think there's anything we can do to reverse the damage that's been done already ?  
 Person2:  It might not be possible to fix the problems that we've created for ourselves , but there are lots of things we can do to prevent more damages from happening .  
 Person1:      Like what ?  
 Person2:  Well , we can use public transport instead of taking our cars for a start .  
 Person1:      What else can we do to protect the environment ?  
 Person2:  If you do have to drive , you should make sure that your car runs on unleaded petrol . Also , your home should use sources of renewable energy .  
 Person1:      How about recycling ? Does that actually help ?  
 Person2:  Yes . You should take your glass , paper , plastic , cardboard , and tin cans to a recycling center .  
 Person1:      What do you think the biggest worry for our future is ?  
 Person2:  I think that the issue of greatest concern is having enough sources of clean water for everyone .  
 Person1:      I had no idea you were such an environmentalist before !  
 Person2:  To be honest , in order for the earth to continue to be a habitable place , we're all going to have to become more interested in the environment . 

1