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_19089486_1 (clubs_involved INTEGER, leagues_entering_this_round VARCHAR, round VARCHAR)
  ### Question:
  Name the least clubs involved for leagues being none for semi finals
  ### Answer:
  SELECT MIN(clubs_involved) FROM table_19089486_1 WHERE leagues_entering_this_round = "none" AND round = "Semi finals"