CREATE TABLE table_name_26 (years VARCHAR2, duration VARCHAR2, actor VARCHAR2)

What years have a duration of 18 years, and patrizio rispo as the actor?
SELECT years FROM table_name_26 WHERE duration = "18 years" AND actor = "patrizio rispo"
SELECT "years" FROM "table_name_26" WHERE "18 years" = "duration" AND "actor" = "patrizio rispo"