CREATE TABLE table_name_38 (grid INT, time_retired VARCHAR, driver VARCHAR)

What is the average grid for johnny herbert with a Time/Retired of +1 lap?
SELECT AVG(grid) FROM table_name_38 WHERE time_retired = "+1 lap" AND driver = "johnny herbert"
SELECT AVG("grid") FROM "table_name_38" WHERE "+1 lap" = "time_retired" AND "driver" = "johnny herbert"