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/7293ac85-52f7-5014-e054-020820f2d1c3-row-e884437448f14cb908b6de176c374a24>