When was the F4 7 series?
CREATE TABLE table_25572068_1 (date VARCHAR, series VARCHAR)
SELECT date FROM table_25572068_1 WHERE series = "F4 7"
### Context: CREATE TABLE table_25572068_1 (date VARCHAR, series VARCHAR) ### Question: When was the F4 7 series? ### Answer: SELECT date FROM table_25572068_1 WHERE series = "F4 7"