user: ### NOW ANSWER:
Question: How many years was the building with 24 floors the tallest?
Columns: ['Name', 'Street address', 'Years as tallest', 'Height feet / m', 'Floors']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['The Blackstone', '800 Washington Avenue', '1929–1936', '157 / 48', 13.0]
SQL:

assistant: SELECT "Years as tallest" FROM "Table" WHERE "Floors" = 24.0;