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:text/cxml define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/5538ac85-7886-9d20-e054-020820f2d1c3-row-2d6cb8b01444f57a7803ba946dde5956>