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  "formatProvenance": "This format can be identified via a container signature in DROID version 6 or later. The PRONOM database cannot currently represent container signatures.",
  "formatSourceDate": "22 Dec 2015",
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  "formatEnvironment": null,
  "formatRisk": null,
  "formatAliases": null,
  "formatTypes": "Spreadsheet",
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    {
      "identifierText": "fmt/837",
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  ],
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    {
      "externalSignature": "qpw",
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}