{ "items" : [
    { "id" : "http://dbpedia.org/resource/Enriques_surface"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In mathematics,  Enriques surfaces are algebraic surfacessuch that the irregularity q = 0 and  the canonical line bundle K is non-trivial but has trivial square. Enriques surfaces are all projective (and therefore Kähler over the complex numbers) and are elliptic surfaces of genus 0.Over fields of characteristic not 2 they are quotients of K3 surfaces by a group of order 2 acting without fixed points and their theory is similar to that of algebraic K3 surfaces."] } } }
