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_6 (yr_plyf INTEGER, g_plyf VARCHAR, coach VARCHAR)
  ### Question:
  What is the sum of the yr plyf of coach ed robinson, who has a G plyf of 0?
  ### Answer:
  SELECT SUM(yr_plyf) FROM table_name_6 WHERE g_plyf = 0 AND coach = "ed robinson"