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_57 (rank INTEGER, bronze VARCHAR, silver VARCHAR)
### Question:
What rank was the country with no bronze but at least 1 silver medals?
### Answer:
SELECT AVG(rank) FROM table_name_57 WHERE bronze < 1 AND silver > 1