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/ld+json define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/ad80ac85-be07-2320-e054-020820d23886-row-e8a9b06acb8425567ea1dcc47a9b4bc4>