{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7306752#body_text"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Government agencies established in 2003",
          "Japanese inventions",
          "1964 establishments in Japan",
          "High-speed rail",
          "Currencies introduced in 1967",
          "Economic globalization"] } } }
