For all countries with 7 bronze medals and a total number of medals less than 13, what's the sum of silver medals?
CREATE TABLE table_name_88 (
    silver INTEGER,
    bronze VARCHAR,
    total VARCHAR
)
SELECT SUM(silver) FROM table_name_88 WHERE bronze = 7 AND total < 13
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: For all countries with 7 bronze medals and a total number of medals less than 13, what's the sum of silver medals? ### Input: CREATE TABLE table_name_88 (
    silver INTEGER,
    bronze VARCHAR,
    total VARCHAR
) ### Response: SELECT SUM(silver) FROM table_name_88 WHERE bronze = 7 AND total < 13