#duplicate__duplication  a copy that corresponds to an original exactly; "he made a duplicate for the files"
  supertype:  copy  a secondary representation of an original; "she made a copy of the designer dress"
  subtype:  computer_backup__backup  (computer science) a copy of a file or directory on a separate storage device; "he made a backup in case the original was accidentally damaged or erased"
  subtype:  counterpart__similitude__twin  a duplicate copy
  subtype:  match.duplicate__mate  an exact duplicate; "when a match is found an entry is made in the notebook"

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