answer: #Person1# tells #Person1#'s mum that Linda bumped into an accident when she saw an old lady on her hands and knees in the middle of the road. Luckily, a witness told the policeman that the old lady was looking for her gold tooth.
documents: #Person1#: Hi, Mum.
  #Person2#: There you are. I'm getting worried. It's so late.
  #Person1#: Yes. I ran into Linda and we went to a pub. She told me a funny thing.
  #Person2#: Oh? What was that?
  #Person1#: Well, she was driving home after work, and she suddenly saw an old lady on her hands and knees in the middle of the road.
  #Person2#: Really?
  #Person1#: Yes, Linda was so shocked that she stopped suddenly and the car behind crashed into hers.
  #Person2#: Was her hurt?
  #Person1#: No.
  #Person2#: And what was the old lady doing?
  #Person1#: I am just coming to that. So Linda got out of her car and saw the old lady pick up something and walk away.
  #Person2#: Lucky indeed. Linda didn't run her over.
  #Person1#: Then a policeman came. But he didn't believe what Linda said.
  #Person2#: Well...
  #Person1#: Luckily there was a witness, a man waiting for a bus. He saw it all. Guess what the old lady was doing?
  #Person2#: I haven't the slightest idea.
  #Person1#: She was looking for her gold tooth.
  #Person2#: A gold tooth?
  #Person1#: Yes, it fell out as she was crossing the road. The witness heard her saying, 'Oh, my gold tooth...'