What time/retired for a grid less than 19, under 21 laps, and made by aprilia?
CREATE TABLE table_54749 (
    "Rider" text,
    "Manufacturer" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" real
)
SELECT "Time/Retired" FROM table_54749 WHERE "Grid" < '19' AND "Manufacturer" = 'aprilia' AND "Laps" < '21'
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 time/retired for a grid less than 19, under 21 laps, and made by aprilia? ### Input: CREATE TABLE table_54749 (
    "Rider" text,
    "Manufacturer" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" real
) ### Response: SELECT "Time/Retired" FROM table_54749 WHERE "Grid" < '19' AND "Manufacturer" = 'aprilia' AND "Laps" < '21'