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_6 (grid INTEGER, time_retired VARCHAR, driver VARCHAR)
### Question:
What is the smallest grid with collision as the Time/Retired for pedro diniz?
### Answer:
SELECT MIN(grid) FROM table_name_6 WHERE time_retired = "collision" AND driver = "pedro diniz"