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/9057ac85-561b-2f4c-e054-020820f2d1c3-row-a8888662c2e481c95058672e4a3a14d7>