What is the top lap that had 6 grids and more than 19 points?
CREATE TABLE table_54339 (
    "Driver" text,
    "Team" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" text,
    "Points" real
)
SELECT MAX("Laps") FROM table_54339 WHERE "Grid" = '6' AND "Points" > '19'
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 lap that had 6 grids and more than 19 points? ### Input: CREATE TABLE table_54339 (
    "Driver" text,
    "Team" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" text,
    "Points" real
) ### Response: SELECT MAX("Laps") FROM table_54339 WHERE "Grid" = '6' AND "Points" > '19'