text: 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_22597626_2 (surface VARCHAR, championship VARCHAR, year VARCHAR)
  ### Question:
  What is the surface made of if the year is 1979 and the championship is US Open?
  ### Answer:
  SELECT surface FROM table_22597626_2 WHERE championship = "US Open" AND year = 1979