user: Question: Name the height when the floors are bigger than 30 at the BNY Mellon Center
Columns: ['Rank', 'Name', 'Height ft / m', 'Floors', 'Year']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['1', 'U.S. Steel Tower', '841 / 256', 64.0, 1970.0]
SQL:

assistant: SELECT "Height ft / m" FROM "Table" WHERE "Floors" > 30.0 AND "Name" = 'BNY Mellon Center';