Name the least ansi code for 609 population 2010
CREATE TABLE table_1900 (
    "Township" text,
    "County" text,
    "Pop. (2010)" real,
    "Land ( sqmi )" text,
    "Water (sqmi)" text,
    "Latitude" text,
    "Longitude" text,
    "GEO ID" real,
    "ANSI code" real
)
SELECT MIN("ANSI code") FROM table_1900 WHERE "Pop. (2010)" = '609'
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: Name the least ansi code for 609 population 2010 ### Input: CREATE TABLE table_1900 (
    "Township" text,
    "County" text,
    "Pop. (2010)" real,
    "Land ( sqmi )" text,
    "Water (sqmi)" text,
    "Latitude" text,
    "Longitude" text,
    "GEO ID" real,
    "ANSI code" real
) ### Response: SELECT MIN("ANSI code") FROM table_1900 WHERE "Pop. (2010)" = '609'