Table schema:
CREATE TABLE table_name_18 (bronze INTEGER, gold VARCHAR, silver VARCHAR, nation VARCHAR)

Question: What is the largest amount of bronze medals when the silver medals are less than 1, and Belgium (BEL) is the nation, and the gold medals are less than 0?
SQL: SELECT MAX(bronze) FROM table_name_18 WHERE silver < 1 AND nation = "belgium (bel)" AND gold < 0