user: Question: What years have a duration of 18 years, and Patrizio Rispo as the actor?
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" = '18 years' AND "Actor" = 'Patrizio Rispo';