{ "items" : [
    { "id" : "http://webisa.webdatacommons.org/concept/_glass_"
      "properties" : {
        "http://www.w3.org/2004/02/skos/core#broader" : [ "http://webisa.webdatacommons.org/concept/dangerous_obstacle_" ] } },

    { "id" : "http://webisa.webdatacommons.org/concept/_object_"
      "properties" : {
        "http://www.w3.org/2004/02/skos/core#broader" : [ "http://webisa.webdatacommons.org/concept/dangerous_obstacle_" ] } },

    { "id" : "http://webisa.webdatacommons.org/concept/_fire_"
      "properties" : {
        "http://www.w3.org/2004/02/skos/core#broader" : [ "http://webisa.webdatacommons.org/concept/dangerous_obstacle_" ] } },

    { "id" : "http://webisa.webdatacommons.org/concept/_river_"
      "properties" : {
        "http://www.w3.org/2004/02/skos/core#broader" : [ "http://webisa.webdatacommons.org/concept/dangerous_obstacle_" ] } },

    { "id" : "http://webisa.webdatacommons.org/concept/_wall_"
      "properties" : {
        "http://www.w3.org/2004/02/skos/core#broader" : [ "http://webisa.webdatacommons.org/concept/dangerous_obstacle_" ] } },

    { "id" : "http://webisa.webdatacommons.org/concept/_spike_"
      "properties" : {
        "http://www.w3.org/2004/02/skos/core#broader" : [ "http://webisa.webdatacommons.org/concept/dangerous_obstacle_"] } } }
