{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7397677#title"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Regions of China",
          "Northern China",
          "Research",
          "Han Chinese",
          "Ethnic groups officially recognized by China",
          "Shanxi",
          "Clinical pathology",
          "Provinces of the People's Republic of China"] } } }
