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_name_50 (date VARCHAR, surface VARCHAR, tournament VARCHAR)
  ### Question:
  What is the date of the Sydney, Australia tournament with a hard surface?
  ### Answer:
  SELECT date FROM table_name_50 WHERE surface = "hard" AND tournament = "sydney, australia"