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 (year_of_marriage INTEGER, her_age VARCHAR, his_age VARCHAR)
  ### Question:
  What is the mean year of marriage when her age was more than 19 and his age was 30?
  ### Answer:
  SELECT AVG(year_of_marriage) FROM table_name_6 WHERE her_age > 19 AND his_age = 30