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_25 (silver INTEGER, rank VARCHAR, total VARCHAR)
### Question:
What is the sum of silvers for countries in rank 8 with totals over 3?
### Answer:
SELECT SUM(silver) FROM table_name_25 WHERE rank = "8" AND total > 3