Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '&' (0x26) in SPARQL expression at '&' SPARQL query: define sql:big-data-const 0 define output:format "HTTP+TTL text/turtle" #output-format:text/turtle define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/fa5eac85-820c-240a-e054-020820d23886-row-e71c33c166acc843e6f0a6e0f2b2d907>