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_13 (surface VARCHAR, score VARCHAR)
### Question:
Which Surface has a Score of 2009 wta tour?
### Answer:
SELECT surface FROM table_name_13 WHERE score = "2009 wta tour"