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_15 (silver INTEGER, nation VARCHAR, gold VARCHAR)
### Question:
How many silvers for south korea with under 1 gold medal?
### Answer:
SELECT MAX(silver) FROM table_name_15 WHERE nation = "south korea" AND gold < 1