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 L01 Information Science D007254 +
  L01.178 Communications Media D003146 +
   L01.178.147 Audiovisual Aids D001296 +
    L01.178.147.846 Tape Recording D013637 +
      L01.178.147.846.734 Videotape Recording D014743 
 L01 Information Science D007254 +
  L01.240 Copying Processes D003308 +
   L01.240.940 Tape Recording D013637 +
     L01.240.940.840 Videotape Recording D014743