{ "items" : [
    { "id" : "http://dbpedia.org/resource/Hopf_conjecture"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In mathematics, Hopf conjecture may refer to one of several conjectural statements from differential geometry and topology attributed to either Eberhard Hopf or Heinz Hopf."] } } }
