Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE ref_product_categories (unit_of_measure VARCHAR, product_category_code VARCHAR)
TABLE: CREATE TABLE products (product_category_code VARCHAR, product_name VARCHAR)

### Question ###
Find the unit of measurement and product category code of product named "chervil".

### Accurate 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"