{
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    "time": "http://www.w3.org/2006/time#",
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    "vcard": "http://www.w3.org/2006/vcard/ns#",
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        "@value": "2017-06-01T07:37:05"
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      "gnss:igsModelCode": "LEIAT504GG      NONE",
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      "@type": "PeriodOfTime",
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}