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_1 (goal_difference INTEGER, position VARCHAR, played VARCHAR)
### Question:
What is the lowest Goal Difference, when Position is "7", and when Played is greater than 30?
### Answer:
SELECT MIN(goal_difference) FROM table_name_1 WHERE position = 7 AND played > 30