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_81 (year_s_ INTEGER, season VARCHAR)
### Question:
When was the earliest with 4 seasons?
### Answer:
SELECT MIN(year_s_) FROM table_name_81 WHERE season = 4