Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_88 (silver INTEGER, total VARCHAR)
### Question:
What is the average number of silver medals won among nations that won 9 medals total?
### Answer:
SELECT AVG(silver) FROM table_name_88 WHERE total = 9