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/824eac85-11b7-a819-e054-020820f2d1c3-row-f66999c5125ac5d9bf73633a5fff461c>