What is the most recent year of disaffiliation of a CHCH-TV station that affiliated after 2001?
CREATE TABLE table_57500 (
    "City of license/market" text,
    "Station" text,
    "Channel TV ( RF )" text,
    "Year of affiliation" real,
    "Year of disaffiliation" real
)
SELECT MAX("Year of disaffiliation") FROM table_57500 WHERE "Station" = 'chch-tv' AND "Year of affiliation" > '2001'
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 most recent year of disaffiliation of a CHCH-TV station that affiliated after 2001? ### Input: CREATE TABLE table_57500 (
    "City of license/market" text,
    "Station" text,
    "Channel TV ( RF )" text,
    "Year of affiliation" real,
    "Year of disaffiliation" real
) ### Response: SELECT MAX("Year of disaffiliation") FROM table_57500 WHERE "Station" = 'chch-tv' AND "Year of affiliation" > '2001'