{ "items" : [
    { "id" : "http://dbpedia.org/resource/Compound_engine"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A compound engine is an engine that has more than one stage for recovering energy from the same working fluid, with the exhaust from the first stage passing through the second stage, and in some cases then on to another subsequent stage or even stages. Originally invented as a means of making steam engines more efficient, the compounding of engines by use of several stages has also been used on internal combustion engines and continues to have niche markets there." ] ,
        "http://xmlns.com/foaf/0.1/depiction" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Curtiss_Wright_R3350-972TC-18_1.jpg" ] ,
        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Curtiss_Wright_R3350-972TC-18_1.jpg?width=300"] } } }
