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/9e6aac85-fc0b-c935-e054-020820f2d1c3-row-af11a2e1229aaf7eb870aff7f5a096f6>