What was the average attendance on October 30, 1938?
CREATE TABLE table_38721 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Attendance" real
)
SELECT AVG("Attendance") FROM table_38721 WHERE "Date" = 'october 30, 1938'
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 was the average attendance on October 30, 1938? ### Input: CREATE TABLE table_38721 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Attendance" real
) ### Response: SELECT AVG("Attendance") FROM table_38721 WHERE "Date" = 'october 30, 1938'