CREATE TABLE table_name_8 (silver NUMBER, bronze VARCHAR2, nation VARCHAR2)

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