answer: #Person2# tells #Person1# #Person2# went out at about 9:30pm and didn't see anyone come into the block flats.
documents: #Person1#: Where were you last night, at exactly nine twenty PM?
  #Person2#: nine twenty pm, I couldn't say. I cann't remember.
  #Person1#: Are you sure you cann't remember?
  #Person2#: I've absolutely certain.
  #Person1#: Were you in or out? Can you remember that?
  #Person2#: I'm not quite positive. I think I went out at about half pass nine.
  #Person1#: Did you see anyone come into the block flats?
  #Person2#: No, I didn't.
  #Person1#: Sure?
  #Person2#: Quite sure.