What's the part 3 of the verb whose class is 4?
CREATE TABLE table_21709 (
    "Class" text,
    "Part 1" text,
    "Part 2" text,
    "Part 3" text,
    "Part 4" text,
    "Verb meaning" text
)
SELECT "Part 3" FROM table_21709 WHERE "Class" = '4'
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's the part 3 of the verb whose class is 4? ### Input: CREATE TABLE table_21709 (
    "Class" text,
    "Part 1" text,
    "Part 2" text,
    "Part 3" text,
    "Part 4" text,
    "Verb meaning" text
) ### Response: SELECT "Part 3" FROM table_21709 WHERE "Class" = '4'