user: Question: What is the name of the series with the unknown host?
Columns: ['Country', 'Name', 'Host(s)', 'Judges', 'Network', 'Air dates']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Belgium (Dutch)', 'Junior MasterChef Belgium', 'unknown', 'Wout Bru Fatima Marzouki', 'vtm', '18 January 2012']
SQL:

assistant: SELECT "Name" FROM "Table" WHERE "Host(s)" = 'unknown';