Name of 900 north michigan, and a Year smaller than 1989 involves what lowest floors?
CREATE TABLE table_name_39 (
    floors INTEGER,
    name VARCHAR,
    year VARCHAR
)
SELECT MIN(floors) FROM table_name_39 WHERE name = "900 north michigan" AND year < 1989
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Name of 900 north michigan, and a Year smaller than 1989 involves what lowest floors? ### Input: CREATE TABLE table_name_39 (
    floors INTEGER,
    name VARCHAR,
    year VARCHAR
) ### Response: SELECT MIN(floors) FROM table_name_39 WHERE name = "900 north michigan" AND year < 1989