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_product_categories (unit_of_measure VARCHAR, product_category_code VARCHAR)
### Question:
What is the unit of measuerment of the product category code "Herbs"?
### Answer:
SELECT unit_of_measure FROM ref_product_categories WHERE product_category_code = "Herbs"