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_29 (points INTEGER, year VARCHAR, chassis VARCHAR)
### Question:
What is the sum of points in 1991, for footwork a11c chassis?
### Answer:
SELECT SUM(points) FROM table_name_29 WHERE year = 1991 AND chassis = "footwork a11c"