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/8785ac85-91b4-9c23-e054-020820d23886-row-7b10f6f0c9d606612d71b838c00f695b>