{
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    "odrl": "http://www.w3.org/ns/odrl/2/",
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        "@type": "xsd:dateTime",
        "@value": "2014-01-18T15:37:40"
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      "gnss:firmware_version": "3.5 Dec,24,2010",
      "gnss:igsModelCode": "TPS GB-1000"
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      "gnss:interval": {
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}