user: ### NOW ANSWER:
Question: What year was the building completed that has 10 floors?
Columns: ['Years tallest', 'Name', 'Height ft / m', 'Floors', 'Year completed']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['1902–1909', 'Dyal-Upchurch Building', '-foot (m)', 6.0, 1902.0]
SQL:

assistant: SELECT AVG("Year completed") FROM "Table" WHERE "Floors" = 10.0;