user: Question: What are the years that have a duration of 15 years and Giulia Poggi as the character?
Columns: ['Actor', 'Character', 'Soap Opera', 'Years', 'Duration']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Patrizio Rispo', 'Raffaele Giordano', 'Un posto al sole', '1996—', '18 years']
SQL:

assistant: SELECT "Years" FROM "Table" WHERE "Duration" = '15 years' AND "Character" = 'Giulia Poggi';