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/7260ac85-c926-a87f-e054-020820f2d1c3-row-6d9e743dbcc6a6cb786f36208bee08c4>