user: Question: Who was the Cover model when the Centerfold Model was Marketa Janska?
Columns: ['Date', 'Cover model', 'Centerfold model', 'Interview subject', '20 Questions']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1-03', 'Tia Carrere', 'Rebecca Anne Ramos', 'Halle Berry', 'Ron Insana']
SQL:

assistant: SELECT "Cover model" FROM "Table" WHERE "Centerfold model" = 'Marketa Janska';