answer: Mr. Green tells Elizabeth what a yard sale is, what she can get there, and why Americans love buying secondhand goods.
documents: #Person1#: Elizabeth, what's your question?
  #Person2#: Excuse me, could you tell me what a yard sale is?
  #Person1#: As the name suggests, it's a sale held in someones yard selling used goods.
  #Person2#: What can I get there?
  #Person1#: You can find books, records, cups and furniture. You name it and they will have it.
  #Person2#: Why do American people love to buy secondhand goods?
  #Person1#: To save money, of course. Some people even hope to find treasures there.
  #Person2#: I see.
  #Person1#: Actually many westerners like other peoples' objects. Even rich people search through used goods for a treasure.
  #Person2#: I understand. Thank you, Mr. Green. You've been very helpful.
  #Person1#: You're welcome.