When is the earliest began operation with a length of sultan ismail and over 27 stations?
CREATE TABLE table_77985 (
    "Line" text,
    "Began operation" real,
    "Stations" real,
    "Length (km)" text,
    "Terminals" text
)
SELECT MIN("Began operation") FROM table_77985 WHERE "Length (km)" = 'sultan ismail' AND "Stations" > '27'
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: When is the earliest began operation with a length of sultan ismail and over 27 stations? ### Input: CREATE TABLE table_77985 (
    "Line" text,
    "Began operation" real,
    "Stations" real,
    "Length (km)" text,
    "Terminals" text
) ### Response: SELECT MIN("Began operation") FROM table_77985 WHERE "Length (km)" = 'sultan ismail' AND "Stations" > '27'