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_45 (year VARCHAR, surface VARCHAR, score VARCHAR)
### Question:
How many years have a Surface of clay, and a Score of 4 : 0?
### Answer:
SELECT COUNT(year) FROM table_name_45 WHERE surface = "clay" AND score = "4 : 0"