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_43 (silver INTEGER, total VARCHAR, rank VARCHAR)
### Question:
What is the sum of silver medals for the entry with rank 3 and a total of 4 medals?
### Answer:
SELECT SUM(silver) FROM table_name_43 WHERE total = 4 AND rank = "3"