answer: Edgar tells #Person1# how to send a card on Yahoo Greetings.
documents: #Person1#: Do you know Yahoo Greetings, Edgar?
  #Person2#: Sure. It's a popular e-card website.
  #Person1#: Can you tell me how to send one on it?
  #Person2#: Okay. Did you get the Yahoo ID?
  #Person1#: ID? What's that?
  #Person2#: I mean, you must register first before you send a card.
  #Person1#: Oh. I see. But I have done it.
  #Person2#: Ok. Choose the card which you like best, and fill in the following blanks with both your and your friend's names and e-mail addresses.
  #Person1#: Is that all?
  #Person2#: Don't forget to send.
  #Person1#: Oh. I see. Thanks.