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_9 (year INTEGER, runner_up VARCHAR)
### Question:
When was the earliest year that Guillermo Vilas was the runner-up?
### Answer:
SELECT MIN(year) FROM table_name_9 WHERE runner_up = "guillermo vilas"