Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '%' (0x25) in SPARQL expression at '%' SPARQL query: define sql:gs-app-callback "ODS" define%20sql%3Adescribe-mode%20%22CBD%22%20%20DESCRIBE%20%3Chttps%3A%2F%2Flinkeddata.uriburner.com%2Fproxy-iri%2F57d1199e4cf0866ff2cc9e1beb9576513aa55bde%3E