{ "items" : [
    { "id" : "http://dbpedia.org/resource/Electro-optic_effect"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "An electro-optic effect is a change in the optical properties of a material in response to an electric field that varies slowly compared with the frequency of light."] } } }
