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_25999087_2 (mountains_classification VARCHAR, winner VARCHAR)
### Question:
How many mountains classifications when Rui Costa is the winner?
### Answer:
SELECT COUNT(mountains_classification) FROM table_25999087_2 WHERE winner = "Rui Costa"