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_29778616_1 (intro_date VARCHAR, throughput VARCHAR)
  ### Question:
  What is the intro date for the throughput of 16 mbit/s?
  ### Answer:
  SELECT intro_date FROM table_29778616_1 WHERE throughput = "16 Mbit/s"