What original air date was for the episode with production code of 108?
CREATE TABLE table_26831 (
    "Series" real,
    "Season" text,
    "Original air date" text,
    "Production code" text,
    "Episode title" text
)
SELECT "Original air date" FROM table_26831 WHERE "Production code" = '108'
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 original air date was for the episode with production code of 108? ### Input: CREATE TABLE table_26831 (
    "Series" real,
    "Season" text,
    "Original air date" text,
    "Production code" text,
    "Episode title" text
) ### Response: SELECT "Original air date" FROM table_26831 WHERE "Production code" = '108'