Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '&' (0x26) in SPARQL expression at '&' SPARQL query: define sql:big-data-const 0 define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/ad80ac85-be07-2320-e054-020820d23886-row-a94e224b382f1820fe765f077e6e1ce3>