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_29474407_11 (year_of_intro VARCHAR, name__designation VARCHAR)
  ### Question:
  How many years of introduction does the Neal Submachine Gun have?
  ### Answer:
  SELECT COUNT(year_of_intro) FROM table_29474407_11 WHERE name__designation = "Neal submachine gun"