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 architect (Id VARCHAR); CREATE TABLE mill (type VARCHAR, architect_id VARCHAR)
### Question:
What are the distinct types of mills that are built by American or Canadian architects?
### Answer:
SELECT DISTINCT T1.type FROM mill AS T1 JOIN architect AS t2 ON T1.architect_id = T2.id WHERE T2.nationality = 'American' OR T2.nationality = 'Canadian'