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/8e79ac85-9ac0-2e07-e054-020820f2d1c3-row-4ed7c10bc4b00a76e7486defd83b3a51>