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_15 (play_offs INTEGER, total VARCHAR, league VARCHAR, player VARCHAR)
  ### Question:
  What is the mean number of play-offs when the league number was bigger than 18, where the player was John Grant and the total number was bigger than 25?
  ### Answer:
  SELECT AVG(play_offs) FROM table_name_15 WHERE league > 18 AND player = "john grant" AND total > 25