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/microdata+json define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/648deeb9-b602-e15a-e054-020820d23886-row-be9c05111c88941b9f056d3eece57d08>