Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '&' (0x26) in SPARQL expression at '&' SPARQL query: define sql:big-data-const 0 define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/3662ac85-595a-0c09-e054-020820f2d1c3-row-75d72a67393cb50be3f4f13b28a2c02c>