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_15 (tournament VARCHAR, semi_finalists VARCHAR)
  ### Question:
  Which Tournament has a Semi finalists of mary pierce elena dementieva?
  ### Answer:
  SELECT tournament FROM table_name_15 WHERE semi_finalists = "mary pierce elena dementieva"