text: 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_12 (year INTEGER, points VARCHAR, chassis VARCHAR)
  ### Question:
  How many years was ensign n180b a Chassis with 4 points?
  ### Answer:
  SELECT SUM(year) FROM table_name_12 WHERE points = 4 AND chassis = "ensign n180b"