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_38 (grid INTEGER, time_retired VARCHAR, driver VARCHAR)
### Question:
What is the average grid for johnny herbert with a Time/Retired of +1 lap?
### Answer:
SELECT AVG(grid) FROM table_name_38 WHERE time_retired = "+1 lap" AND driver = "johnny herbert"