Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '&' (0x26) in SPARQL expression at '&' SPARQL query: define sql:big-data-const 0 define output:format "HTTP+TTL text/turtle" #output-format:text/turtle define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/4c5cac85-2eeb-b568-e054-020820f2d1c3-row-e8faf6a63ff7f63b1044c5ac41f4e481>