answer: #Person1# and #Person2# will use a coupon for a supermarket.
documents: #Person1#: Why not go to the supermarket today, the coupon will be past due in three days.
  #Person2#: Sure. Can we use it in Today Supermarket?
  #Person1#: Let me check. Yes, we can.
  #Person2#: I really don't know what to buy.