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_99 (laps INTEGER, grid VARCHAR, time_retired VARCHAR)
### Question:
How many laps had a grid of greater than 17 and retired due to collision?
### Answer:
SELECT SUM(laps) FROM table_name_99 WHERE grid > 17 AND time_retired = "collision"