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/8676ac85-acf4-a719-e054-020820d23886-row-dd36be007320da3f78a616ed7a080e3d>