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 (bronze INTEGER, rank VARCHAR, silver VARCHAR)
### Question:
What is the average bronze with a rank of 4 and less than 1 silver?
### Answer:
SELECT AVG(bronze) FROM table_name_73 WHERE rank = 4 AND silver < 1