{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7287735#title"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Viral respiratory tract infections",
          "Alphacoronaviruses",
          "Antivirals",
          "Gilead Sciences",
          "Heterocyclic compounds (2 rings)",
          "Causes of death"] } } }
