What is the average number of pieces for boards that started in 1941 and were released after 2001?
CREATE TABLE table_50306 (
    "Release" real,
    "Start" text,
    "Pieces" real,
    "Board (inches)" text,
    "Board (cm)" text,
    "Type" text
)
SELECT AVG("Pieces") FROM table_50306 WHERE "Start" = '1941' AND "Release" > '2001'
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 average number of pieces for boards that started in 1941 and were released after 2001? ### Input: CREATE TABLE table_50306 (
    "Release" real,
    "Start" text,
    "Pieces" real,
    "Board (inches)" text,
    "Board (cm)" text,
    "Type" text
) ### Response: SELECT AVG("Pieces") FROM table_50306 WHERE "Start" = '1941' AND "Release" > '2001'