Project(OrderBy(BGP( ?item <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/dcat#Dataset> .
                     ?theme <http://www.w3.org/2004/02/skos/core#prefLabel> ?themeName .
                     ?item <http://www.w3.org/ns/dcat#theme> ?theme .
                     ?item <http://purl.org/dc/terms/title> ?title), (?item)),
        {?item, ?title, ?theme, ?themeName})