answer: #Person2# tells #Person1# what a UFO is and believes in its existence. #Person2# thinks countries are working hard to find a planet that we can live on in the future when global warming destroys the planet.
documents: #Person1#: Do you believe in UFO's? 
  #Person2#: Sure. A UFO is just a space vehicle from another planet. If you think about it, our space shuttles are UFOs. 
  #Person1#: I've never thought about it like that before. 
  #Person2#: I've seen photos of UFOs in America before, but they've all looked doctored up. 
  #Person1#: Do you think that there's life on other planets? 
  #Person2#: I think there must be. 
  #Person1#: Why is that? 
  #Person2#: I don't't think it would make sense if we were the only beings in this whole world. The world is just far too big for that. 
  #Person1#: Do you think that there's intelligent life trying to contact us? 
  #Person2#: No, but we're trying to contact them. 
  #Person1#: I suppose you're right. 
  #Person2#: I think that countries are working hard to find a planet that we can live on in the future so that when global warming destroys this planet, humankind will not become extinct. 
  #Person1#: Do you really think that global warming wil destroy Earth some day? 
  #Person2#: There's a lot of evidence that suggest it will, but I don't think it's going to happen any time soon.