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_24850630_3 (venue VARCHAR, race VARCHAR)
  ### Question:
  The MacKinnon Stakes races took place on how many venues?
  ### Answer:
  SELECT COUNT(venue) FROM table_24850630_3 WHERE race = "Mackinnon Stakes"