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 Ref_template_types (template_type_description VARCHAR, template_type_code VARCHAR)
### Question:
What is the template type descriptions for template type code "AD".
### Answer:
SELECT template_type_description FROM Ref_template_types WHERE template_type_code = "AD"