{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC5324805#title"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Member states of the Commonwealth of Nations",
          "Federal monarchies",
          "Canada",
          "Virology",
          "Member states of the United Nations",
          "G20 nations",
          "English-speaking countries and territories"] } } }
