What team had less than 291 total points whole having 76 bronze and over 21 gold?
CREATE TABLE table_37924 (
    "Rank" real,
    "Province" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" real
)
SELECT SUM("Silver") FROM table_37924 WHERE "Gold" > '21' AND "Bronze" = '76' AND "Total" < '291'
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 team had less than 291 total points whole having 76 bronze and over 21 gold? ### Input: CREATE TABLE table_37924 (
    "Rank" real,
    "Province" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" real
) ### Response: SELECT SUM("Silver") FROM table_37924 WHERE "Gold" > '21' AND "Bronze" = '76' AND "Total" < '291'