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+json define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/ad80ac85-be07-2320-e054-020820d23886-row-aa760c961055963eac1f0c36515cce8a>