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/7788ac85-0a38-e126-e054-020820d23886-row-538b97c223a740a0691c319399587053>