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/dc6eac85-978d-f613-e054-020820d23886-row-6cb977edd1d9a0787b2c96594c05638a>