What is the sum of silver medals won for rank 7?
CREATE TABLE table_name_30 (
    silver INTEGER,
    rank VARCHAR
)
SELECT SUM(silver) FROM table_name_30 WHERE rank = "7"
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 sum of silver medals won for rank 7? ### Input: CREATE TABLE table_name_30 (
    silver INTEGER,
    rank VARCHAR
) ### Response: SELECT SUM(silver) FROM table_name_30 WHERE rank = "7"