user: Question: which Cover model has a Centerfold model of Jennifer Walcott?
Columns: ['Date', 'Cover model', 'Centerfold model', '20 Questions', 'Pictorials']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1-01', 'Gabrielle Reece', 'Irina Voronina', 'Carol Alt', 'Gabrielle Reece']
SQL:

assistant: SELECT "Cover model" FROM "Table" WHERE "Centerfold model" = 'Jennifer Walcott';