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_23799417_1 (production_code VARCHAR, directed_by VARCHAR)
### Question:
What is the production code directed by Matt Shakman?
### Answer:
SELECT production_code FROM table_23799417_1 WHERE directed_by = "Matt Shakman"