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_2 (grid INTEGER, manufacturer VARCHAR, laps VARCHAR)
### Question:
What is the average grid for vehicles manufactured by Aprilia and having run more than 16 laps?
### Answer:
SELECT AVG(grid) FROM table_name_2 WHERE manufacturer = "aprilia" AND laps > 16