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_68 (year INTEGER, entrant VARCHAR, chassis VARCHAR)
  ### Question:
  What was the sum of the years, when the entrant was Scuderia Ferrari, and when the Chassis was Ferrari 312/66?
  ### Answer:
  SELECT SUM(year) FROM table_name_68 WHERE entrant = "scuderia ferrari" AND chassis = "ferrari 312/66"