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_22860698_2 (surface VARCHAR, championship VARCHAR, year VARCHAR)
### Question:
What is the surface when the us open is the championship in the year 1979?
### Answer:
SELECT surface FROM table_22860698_2 WHERE championship = "US Open" AND year = 1979