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_69 (year INTEGER, entrant VARCHAR, points VARCHAR)
### Question:
What was the sum of the years, when the entrant was Scuderia Centro Sud, and when there were 6 points?
### Answer:
SELECT SUM(year) FROM table_name_69 WHERE entrant = "scuderia centro sud" AND points = 6