CREATE TABLE table_name_72 (silver INTEGER, nation VARCHAR(255), gold VARCHAR(255), total VARCHAR(255), bronze VARCHAR(255))
What is the lowest number of silver medals received by Austria when they receive more than 3 total medals, more than 22 bronze medals, and fewer than 395 gold medals?
    
SQL: SELECT MIN(silver) FROM table_name_72 WHERE total > 3 AND bronze > 22 AND gold < 395 AND nation = "austria"