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 track (year_opened VARCHAR, seating INTEGER)
### Question:
Show year where a track with a seating at least 5000 opened and a track with seating no more than 4000 opened.
### Answer:
SELECT year_opened FROM track WHERE seating BETWEEN 4000 AND 5000