What is the average episode number with q146 format?
CREATE TABLE table_39639 (
    "Episode #" real,
    "Season #" real,
    "Format #" text,
    "Title" text,
    "Original Airdate" text
)
SELECT AVG("Episode #") FROM table_39639 WHERE "Format #" = 'q146'
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 episode number with q146 format? ### Input: CREATE TABLE table_39639 (
    "Episode #" real,
    "Season #" real,
    "Format #" text,
    "Title" text,
    "Original Airdate" text
) ### Response: SELECT AVG("Episode #") FROM table_39639 WHERE "Format #" = 'q146'