What is average Overall, when Pick is 19?
CREATE TABLE table_44768 (
    "Round" real,
    "Pick" real,
    "Overall" real,
    "Name" text,
    "Position" text,
    "College" text
)
SELECT AVG("Overall") FROM table_44768 WHERE "Pick" = '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 average Overall, when Pick is 19? ### Input: CREATE TABLE table_44768 (
    "Round" real,
    "Pick" real,
    "Overall" real,
    "Name" text,
    "Position" text,
    "College" text
) ### Response: SELECT AVG("Overall") FROM table_44768 WHERE "Pick" = '19'