What is the Valvetrain of the Diesel Engines Model?
CREATE TABLE table_name_12 (
    valvetrain VARCHAR,
    model VARCHAR
)
SELECT valvetrain FROM table_name_12 WHERE model = "diesel engines"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the Valvetrain of the Diesel Engines Model? ### Input: CREATE TABLE table_name_12 (
    valvetrain VARCHAR,
    model VARCHAR
) ### Response: SELECT valvetrain FROM table_name_12 WHERE model = "diesel engines"