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_50 (silver INTEGER, gold VARCHAR, nation VARCHAR)
### Question:
what is the highest amount of silver when gold is 0 for soviet union?
### Answer:
SELECT MAX(silver) FROM table_name_50 WHERE gold = 0 AND nation = "soviet union"