dialogue: #Person1#: Do you know anything about health food?
  #Person2#: It is so popular among people to preserve health now, so I read some books about health food.
  #Person1#: Can you give me some examples?
  #Person2#: Drinking warm and fresh water in the morning on wakening up is one of ways to keep healthy.
  #Person1#: Really? Why we must have warm and fresh water?
  #Person2#: Warm water can be good for your stomach, which is empty at that moment. And freshness can keep the water active to clean your digest system.
  #Person1#: Anything else?
  #Person2#: Yogurt, because it has protein, vitamins and it is acidic. If you drink it everyday, your stomach will be more comfortable.
summary: #Person1# asks #Person2# about health food and concrete examples. #Person2# lists warm and fresh water and yogurt and explains the reason.
topic: healthy food