{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7164034#title"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Vaccination",
          "18th-century inventions",
          "Gas gangrene",
          "Intestinal infectious diseases",
          "Immunology",
          "Vaccines",
          "Gram-positive bacteria",
          "Virology",
          "Bacteria described in 1937",
          "Clostridiaceae",
          "Clostridium",
          "Inflammations"] } } }
