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_8 (silver INTEGER, bronze VARCHAR, nation VARCHAR)
### Question:
What is the least amount of silver medals won by Total with more than 1 bronze and more than 18 total medals won?
### Answer:
SELECT MIN(silver) FROM table_name_8 WHERE bronze > 1 AND nation = "total" AND "total" > 18