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    "odrl": "http://www.w3.org/ns/odrl/2/",
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      "dct:license": {
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      "dct:modified": {
        "@type": "xsd:dateTime",
        "@value": "2017-07-04T08:24:19"
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      "gnss:format": {
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      "@type": "PeriodOfTime",
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}