Silver larger than 0, and a Total smaller than 3, and a Nation of bulgaria, and a Bronze smaller than 0 had what sum of gold?
CREATE TABLE table_name_51 (
    gold INTEGER,
    bronze VARCHAR,
    nation VARCHAR,
    silver VARCHAR,
    total VARCHAR
)
SELECT SUM(gold) FROM table_name_51 WHERE silver > 0 AND total < 3 AND nation = "bulgaria" AND bronze < 0
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: Silver larger than 0, and a Total smaller than 3, and a Nation of bulgaria, and a Bronze smaller than 0 had what sum of gold? ### Input: CREATE TABLE table_name_51 (
    gold INTEGER,
    bronze VARCHAR,
    nation VARCHAR,
    silver VARCHAR,
    total VARCHAR
) ### Response: SELECT SUM(gold) FROM table_name_51 WHERE silver > 0 AND total < 3 AND nation = "bulgaria" AND bronze < 0