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_39 (gold INTEGER, nation VARCHAR, silver VARCHAR)
### Question:
Which Gold has a Nation of sri lanka, and a Silver smaller than 10?
### Answer:
SELECT AVG(gold) FROM table_name_39 WHERE nation = "sri lanka" AND silver < 10