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_73 (silver INTEGER, gold VARCHAR, rank VARCHAR)
### Question:
What is the average number of silver medals for countries with 0 gold and rank under 3?
### Answer:
SELECT AVG(silver) FROM table_name_73 WHERE gold = 0 AND rank < 3