Which year has a railway class of 250?
CREATE TABLE table_5679 (
    "Gauge" text,
    "Railway" text,
    "Class" text,
    "Works no." text,
    "Year" text,
    "Builder" text
)
SELECT "Year" FROM table_5679 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_5679 (
    "Gauge" text,
    "Railway" text,
    "Class" text,
    "Works no." text,
    "Year" text,
    "Builder" text
) ### Response: SELECT "Year" FROM table_5679 WHERE "Class" = '250'