user: Question: Who won when the presenter was Tatiana Stefanidou?
Columns: ['Series', 'TV Channel', 'Launch Date', 'Finale Date', 'Days', 'The Winner', 'The Prize', 'The Presenter']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['Big Brother 1', 'ANT1', 'September 10, 2001', 'December 31, 2001', 113.0, 'Giorgos Triantafyllidis', '50,000,000 GRD', 'Andreas Mikroutsikos']
SQL:

assistant: SELECT "The Winner" FROM "Table" WHERE "The Presenter" = 'Tatiana Stefanidou';