Which Gold has a Total of 721?
CREATE TABLE table_13214 (
    "Rank" text,
    "Nation" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" real
)
SELECT AVG("Gold") FROM table_13214 WHERE "Total" = '721'
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: Which Gold has a Total of 721? ### Input: CREATE TABLE table_13214 (
    "Rank" text,
    "Nation" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" real
) ### Response: SELECT AVG("Gold") FROM table_13214 WHERE "Total" = '721'