What is the maximum area (in acres) of the Knockacullen townland?
CREATE TABLE table_74471 (
    "Townland" text,
    "Area( acres )" real,
    "Barony" text,
    "Civil parish" text,
    "Poor law union" text
)
SELECT MAX("Area( acres )") FROM table_74471 WHERE "Townland" = 'Knockacullen'
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 maximum area (in acres) of the Knockacullen townland? ### Input: CREATE TABLE table_74471 (
    "Townland" text,
    "Area( acres )" real,
    "Barony" text,
    "Civil parish" text,
    "Poor law union" text
) ### Response: SELECT MAX("Area( acres )") FROM table_74471 WHERE "Townland" = 'Knockacullen'