Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '&' (0x26) in SPARQL expression at '&' SPARQL query: define sql:big-data-const 0 define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/aa53ac85-fdf8-9501-e054-020820d23886-row-9c46b41c468d0d4a82a20bf573c9d1ee>