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_27155243_4 (written_by VARCHAR, episode__number VARCHAR)
### Question:
How many items appear in the written by column in episode 3?
### Answer:
SELECT COUNT(written_by) FROM table_27155243_4 WHERE episode__number = 3