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_27573848_18 (mountains_classification VARCHAR, winner VARCHAR)
### Question:
How many times was Robert Gesink a winner?
### Answer:
SELECT COUNT(mountains_classification) FROM table_27573848_18 WHERE winner = "Robert Gesink"