{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7326551#body_text"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Technology companies based in the San Francisco Bay Area",
          "Logical consequence",
          "Satisfiability problems",
          "Multinational companies headquartered in the United States",
          "Logic in computer science"] } } }
