user: Question: When did the rank 9 building got completed?
Columns: ['Rank', 'Building Name', 'Street address', 'Height feet (meters)', 'Floors', 'Completed']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['1', 'Kettering Tower', '40 N. Main Street', '405 (124)', 30.0, 1970.0]
SQL:

assistant: SELECT "Completed" FROM "Table" WHERE "Rank" = '9';