user: ### NOW ANSWER:
Question: Name the years as tallest when floors are larger than 18
Columns: ['Name', 'Street address', 'Years as tallest', 'Height ft / m', 'Floors']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['First National Bank Building [A ]', '217-233 Central Avenue NW', '1922–1954', '141 / 43', 9.0]
SQL:

assistant: SELECT "Years as tallest" FROM "Table" WHERE "Floors" > 18.0;