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