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_79 (silver INTEGER, bronze VARCHAR, total VARCHAR)
### Question:
What is the average number of silver medals of the nation with 3 bronzes and more than 4 total medals?
### Answer:
SELECT AVG(silver) FROM table_name_79 WHERE bronze = 3 AND total > 4