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_15026994_3 (writer VARCHAR, director VARCHAR)
### Question:
Who wrote the episode that David Tucker directed?
### Answer:
SELECT COUNT(writer) FROM table_15026994_3 WHERE director = "David Tucker"