CREATE TABLE table_name_29 (date INT, record VARCHAR, game VARCHAR)

What was the average date with a record of 30-31-9 in a game over 70?
SELECT AVG(date) FROM table_name_29 WHERE record = "30-31-9" AND game > 70
SELECT AVG("date") FROM "table_name_29" WHERE "30-31-9" = "record" AND "game" > 70