{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC5321279#body_text"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Public holidays in Kyrgyzstan",
          "Public holidays in the United Kingdom",
          "Dengue fever",
          "Kamen Rider television series"] } } }
