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/rdf+json define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/7260ac85-c926-a87f-e054-020820f2d1c3-row-2a4d7b9fb006d50bf89f7e772ec4c8c8>