What is the top grid that roger williamson lapped less than 7?
CREATE TABLE table_name_73 (
    grid INTEGER,
    driver VARCHAR,
    laps VARCHAR
)
SELECT MAX(grid) FROM table_name_73 WHERE driver = "roger williamson" AND laps < 7
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the top grid that roger williamson lapped less than 7? ### Input: CREATE TABLE table_name_73 (
    grid INTEGER,
    driver VARCHAR,
    laps VARCHAR
) ### Response: SELECT MAX(grid) FROM table_name_73 WHERE driver = "roger williamson" AND laps < 7