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_79 (surface VARCHAR, partner VARCHAR, date VARCHAR)
### Question:
What was the Surface for the Partner of Jürgen Melzer, and a Date of July 16, 2011?
### Answer:
SELECT surface FROM table_name_79 WHERE partner = "jürgen melzer" AND date = "july 16, 2011"