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_160728_4 (network VARCHAR, channel VARCHAR)
  ### Question:
  How many networks are there that have a channel number 7?
  ### Answer:
  SELECT COUNT(network) FROM table_160728_4 WHERE channel = 7