What is the production code for season episode 8?
CREATE TABLE table_18778 (
    "Series Number" real,
    "Season Number" real,
    "Episode Title" text,
    "Premiere Date" text,
    "Production Code" real
)
SELECT MIN("Production Code") FROM table_18778 WHERE "Season Number" = '8'
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 production code for season episode 8? ### Input: CREATE TABLE table_18778 (
    "Series Number" real,
    "Season Number" real,
    "Episode Title" text,
    "Premiere Date" text,
    "Production Code" real
) ### Response: SELECT MIN("Production Code") FROM table_18778 WHERE "Season Number" = '8'