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_21781578_2 (season_no VARCHAR, directed_by VARCHAR)
### Question:
What was the season number episode directed by John David Coles?
### Answer:
SELECT season_no FROM table_21781578_2 WHERE directed_by = "John David Coles"