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_87 (silver INTEGER, rank VARCHAR, bronze VARCHAR)
### Question:
What is the average Silver, when Rank is 5, and when Bronze is less than 1?
### Answer:
SELECT AVG(silver) FROM table_name_87 WHERE rank = 5 AND bronze < 1