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_77 (points INTEGER, year VARCHAR, class VARCHAR, wins VARCHAR)
### Question:
How many points have 500cc for the class, a win greater than 0, with a year after 1974?
### Answer:
SELECT SUM(points) FROM table_name_77 WHERE class = "500cc" AND wins > 0 AND year > 1974