{ "items" : [
    { "id" : "http://ns.inria.fr/covid19/PMC7155213#body_text"
      "properties" : {
        "http://purl.org/dc/terms/subject" : [ "Differential equations",
          "Numerical differential equations",
          "Algorithms",
          "Numerical software",
          "Time scales",
          "Software quality",
          "Numerical analysis"] } } }
