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_181892_4 (year VARCHAR, chassis VARCHAR)
  ### Question:
  How many years was the chassis a lotus-ford 38/7?
  ### Answer:
  SELECT COUNT(year) FROM table_181892_4 WHERE chassis = "Lotus-Ford 38/7"