{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC4642834#body_text"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Scientific instrument makers",
          "2014 mergers and acquisitions",
          "People from Saxe-Weimar-Eisenach"] } } }
