CREATE TABLE table_name_64 (gold INTEGER, total VARCHAR(255), silver VARCHAR(255), bronze VARCHAR(255), type VARCHAR(255))
What is the average gold of the winter athlete with 1 bronze, less than 3 silver, and less than 4 total medals?
    
SQL: SELECT AVG(gold) FROM table_name_64 WHERE bronze = 1 AND type = "winter" AND silver < 3 AND total < 4