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 Project_Staff (date_to VARCHAR)
  ### Question:
  What is the last date of the staff leaving the projects?
  ### Answer:
  SELECT date_to FROM Project_Staff ORDER BY date_to DESC LIMIT 1