#recording.signal  signal encoding something (e.g., picture or sound) that has been recorded
  supertype:  signal__sign__signaling  any communication that encodes a message; "signals from the boat suddenly stopped"
  subtype:  bologram__bolograph  record or recording made by a bolometer
  subtype:  chromatogram  the recording (column or paper strip) on which the constituents of a mixture are adsorbed in chromatography
  subtype:  oscillogram  the recording produced by an oscillograph
  subtype:  spirogram  a recording of breathing made with a spirograph

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