{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7126802#body_text"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Tick-borne diseases",
          "Catalysis",
          "Chemical reactions",
          "Synchrotron-related techniques",
          "Egg dishes"] } } }
