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/5538ac85-7886-9d20-e054-020820f2d1c3-row-3f7d7f18aaebbafd22ee33b747859682>