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_55 (chng VARCHAR, rank VARCHAR, prev VARCHAR)
  ### Question:
  What chng has a rank greater than 6, with 12 as a prev?
  ### Answer:
  SELECT chng FROM table_name_55 WHERE rank > 6 AND prev = 12