Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '&' (0x26) in SPARQL expression at '&' SPARQL query: define sql:big-data-const 0 #output-format:application/rdf+xml define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/ac97ac85-fed1-0833-e054-020820d23886-row-37b6cd9d63198f5336e5ed44517c9143>