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_89 (missing VARCHAR, unit VARCHAR, killed VARCHAR, wounded VARCHAR)
  ### Question:
  How many of the Royal Waggon Train Unit were Missing while having a Killed of 0 off 0 men and a Wounded of 0 off 0 men?
  ### Answer:
  SELECT missing FROM table_name_89 WHERE killed = "0 off 0 men" AND wounded = "0 off 0 men" AND unit = "royal waggon train"