Question: Find the unit of measurement and product category code of product named "chervil".
Schema: create table ref_product_categories (unit_of_measure varchar, product_category_code varchar, PRIMARY KEY (unit_of_measure)); create table products (product_category_code varchar, product_name varchar, PRIMARY KEY (product_category_code))
SQL: 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"