SELECT t2.unit_of_measure, t2.product_category_code FROM products AS t1 JOIN ref_product_categories AS t2 ON t1.product_category_code = t2.product_category_code WHERE t1.product_name = "chervil"
Find the unit of measurement and product category code of product named 'chervil'.
CREATE TABLE ref_product_categories (
    unit_of_measure VARCHAR,
    product_category_code VARCHAR
)

CREATE TABLE products (
    product_category_code VARCHAR,
    product_name VARCHAR
)