Which year has a railway class of 250?
CREATE TABLE table_name_19 (
    year VARCHAR,
    class VARCHAR
)
SELECT year FROM table_name_19 WHERE class = "250"
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: Which year has a railway class of 250? ### Input: CREATE TABLE table_name_19 (
    year VARCHAR,
    class VARCHAR
) ### Response: SELECT year FROM table_name_19 WHERE class = "250"