Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_80 (opened INTEGER, system VARCHAR, daily_ridership VARCHAR)
### Question:
Which Opened has a System of c-train, and a Daily ridership smaller than 269,600?
### Answer:
SELECT MAX(opened) FROM table_name_80 WHERE system = "c-train" AND daily_ridership < 269 OFFSET 600