What's the lowest rank of the United States with a time less than 24.63?
CREATE TABLE table_64912 (
    "Rank" real,
    "Lane" real,
    "Name" text,
    "Nationality" text,
    "Time" real
)
SELECT MIN("Rank") FROM table_64912 WHERE "Nationality" = 'united states' AND "Time" < '24.63'
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's the lowest rank of the United States with a time less than 24.63? ### Input: CREATE TABLE table_64912 (
    "Rank" real,
    "Lane" real,
    "Name" text,
    "Nationality" text,
    "Time" real
) ### Response: SELECT MIN("Rank") FROM table_64912 WHERE "Nationality" = 'united states' AND "Time" < '24.63'