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_68 (grid INTEGER, time_retired VARCHAR, laps VARCHAR)
### Question:
What's the average Grid for those who spun off after Lap 64?
### Answer:
SELECT AVG(grid) FROM table_name_68 WHERE time_retired = "spun off" AND laps > 64