Name the car number for 1997
CREATE TABLE table_1688640_4 (car__number VARCHAR, year_started VARCHAR)
SELECT car__number FROM table_1688640_4 WHERE year_started = 1997
### Context: CREATE TABLE table_1688640_4 (car__number VARCHAR, year_started VARCHAR) ### Question: Name the car number for 1997 ### Answer: SELECT car__number FROM table_1688640_4 WHERE year_started = 1997