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:application/microdata+json define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/2559ac85-459f-1a57-e054-020820f2d1c3-row-8e97d6b4a82b45a81fe2ba9430bb6be3>