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_18646111_13 (semifinals VARCHAR, class VARCHAR)
  ### Question:
  Name the number of semifinals for tt2
  ### Answer:
  SELECT COUNT(semifinals) FROM table_18646111_13 WHERE class = "TT2"