{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7094457#body_text"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Songs written by Christian Nodal",
          "Disbanded Colombian drug cartels",
          "Expedited border crossing schemes",
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          "Event management companies of France"] } } }
