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_21 (points VARCHAR, engine VARCHAR, year VARCHAR)
### Question:
What is total amount of points of entrants with a ford cosworth engine and a year later than 1991?
### Answer:
SELECT COUNT(points) FROM table_name_21 WHERE engine = "ford cosworth" AND year > 1991