What is the rank of the airport with freight ( metric tonnes ) of 255121?
CREATE TABLE table_19011 (
    "Rank" real,
    "Airport" text,
    "Total Passengers" real,
    "% Change 2008/2009" text,
    "International Passengers" real,
    "Domestic Passengers" real,
    "Transit Passengers" real,
    "Aircraft Movements" real,
    "Freight ( Metric Tonnes )" real
)
SELECT "Rank" FROM table_19011 WHERE "Freight ( Metric Tonnes )" = '255121'
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 rank of the airport with freight ( metric tonnes ) of 255121? ### Input: CREATE TABLE table_19011 (
    "Rank" real,
    "Airport" text,
    "Total Passengers" real,
    "% Change 2008/2009" text,
    "International Passengers" real,
    "Domestic Passengers" real,
    "Transit Passengers" real,
    "Aircraft Movements" real,
    "Freight ( Metric Tonnes )" real
) ### Response: SELECT "Rank" FROM table_19011 WHERE "Freight ( Metric Tonnes )" = '255121'