What is the name of the community with an area of 30.75 sq. km.?
CREATE TABLE table_21380 (
    "Official Name" text,
    "Status" text,
    "Area km 2" text,
    "Population" real,
    "Census Ranking" text
)
SELECT "Official Name" FROM table_21380 WHERE "Area km 2" = '30.75'
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 name of the community with an area of 30.75 sq. km.? ### Input: CREATE TABLE table_21380 (
    "Official Name" text,
    "Status" text,
    "Area km 2" text,
    "Population" real,
    "Census Ranking" text
) ### Response: SELECT "Official Name" FROM table_21380 WHERE "Area km 2" = '30.75'