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_1307572_1 (reverse VARCHAR, diameter VARCHAR)
  ### Question:
  How many coins have a diameter of 23mm?
  ### Answer:
  SELECT COUNT(reverse) FROM table_1307572_1 WHERE diameter = "23mm"