{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC4828640#title"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "1960 establishments in Africa",
          "Island countries of the Indian Ocean",
          "Member states of the African Union",
          "Epidemiology"] } } }
