Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '%' (0x25) in SPARQL expression at '%' SPARQL query: define sql:big-data-const 0 define%20sql%3Adescribe-mode%20%22CBD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdata.doremus.org%2Fevent%2Fa4575c7c-49b5-38d5-b38d-de8d4d7d6702%2Factivity%2F1%3E