answer: #Person2# met a robber with a knife and another two passengers held the robber. Two policemen took the robbers to the police station.
documents: #Person1#: Wow, your coat's got very dirty. Did you fall?
  #Person2#: Yes, I had a terrible experience on the underground train when I was on the way to work. I tell you, a man came up to me and pulled out a knife. He pointed it right at me.
  #Person1#: Oh, no. Are you all right? Did he hurt you?
  #Person2#: No, he didn't, but he took my handbag.
  #Person1#: Then what happened? What did you do?
  #Person2#: I caught hold of his knife and he pushed me to the floor.
  #Person1#: Oh, no. Why did you catch hold of his knife? That's dangerous.
  #Person2#: I don't know. I didn't think.
  #Person1#: What did the other passengers do? Did they help you?
  #Person2#: Yes. Two men ran after the robber and held him.
  #Person1#: Did the police come?
  #Person2#: Yes, the police were called and two policemen came and took the robbers to the police station.
  #Person1#: What a story! Thank God, you are all right.