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/3c55ac85-a39a-b502-e054-020820d23886-row-c1d8b27569bbf8bb740552252e8b4802>