answer: #Person1# asks #Person2# what obese people should do to lose weight. #Person2# says they need to eat healthy foods with the increase of physical exercise. #Person2# knows much about food and eating because #Person2# used to be twice the size that #Person2#'s now.
documents: #Person1#: What do you think about all the different diets that people go on?
  #Person2#: I don't think dieting is good for you. It's much better to eat a balanced diet and to never get overweight to begin with!
  #Person1#: But what do you think about people who are obese? What should they do to lose weight?
  #Person2#: They need to eat healthy foods, but they also have to increase the amount of physical exercise every day. They don't have to cut out fattening foods altogether, though.
  #Person1#: So you think it's OK for people who are dieting to eat chocolate, don't you?
  #Person2#: Sure, they can eat some chocolate. As long as they are exercising and eating mostly healthy foods, there's nothing wrong with having a small dessert.
  #Person1#: How about drinking soda?
  #Person2#: Many people gain weight by drinking far too much soda. Soda should be treated seriously ; there's simply no nutritional value in it whatsoever.
  #Person1#: And have you ever tried taking vitamins?
  #Person2#: I used to take vitamins every day, but I don't take them anymore. Vitamins are good as a supplement, but they don't do much good if you don't have a well-balanced diet to start.
  #Person1#: How do you know so much about food and dieting?
  #Person2#: You might not believe this, but I used to be twice the size that I am now!