{
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    "vcard": "http://www.w3.org/2006/vcard/ns#",
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      },
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      },
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        "@value": "2015-05-01T09:51:18"
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      "gnss:igsModelCode": "LEICA GRX1200GGPRO"
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      },
      "gnss:interval": {
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        "@value": "2015-02-09T00:00:00"
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      "gnss:markerName": "PENC00HUN",
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      "@type": "PeriodOfTime",
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        "@value": "2015-02-09T23:59:30"
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}