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_97 (silver INTEGER, bronze VARCHAR, overall VARCHAR)
### Question:
How many silver when bronze is 25 and overall is less than 67?
### Answer:
SELECT SUM(silver) FROM table_name_97 WHERE bronze = 25 AND overall < 67