{ "items" : [
    { "id" : "http://dbpedia.org/resource/Blocks_world"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "The blocks world is one of the most famous planning domains in artificial intelligence. Imagine a set of cubes (blocks) sitting on a table.  The goal is to build one or more vertical stacks of blocks.  The catch is that only one block may be moved at a time: it may either be placed on the table or placed atop another block. Because of this, any blocks that are, at a given time, under another block cannot be moved."] } } }
