{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7090755#title"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Probiotics",
          "Genitourinary system",
          "Digestive system",
          "Prebiotics (nutrition)",
          "Routes of administration",
          "Respiratory system",
          "Bacteriology",
          "Human head and neck"] } } }
