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_1 (surface VARCHAR, opponents_in_the_final VARCHAR)
  ### Question:
  On what surface was the tournament with opponents kathleen horvath marcella mesker in the finals?
  ### Answer:
  SELECT surface FROM table_name_1 WHERE opponents_in_the_final = "kathleen horvath marcella mesker"