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/ld+json define sql:describe-mode "CBD" DESCRIBE <http://dati.lavoro.gov.it/lod/b19bac85-29ad-7e35-e054-020820d23886-row-e81d2cbb47f9ac8b3fd04e4c76d534d0>