Tell me the average units sold for square enix
CREATE TABLE table_31537 (
    "Place" real,
    "Title" text,
    "Platform" text,
    "Publisher" text,
    "Units sold" real
)
SELECT AVG("Units sold") FROM table_31537 WHERE "Publisher" = 'square enix'
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: Tell me the average units sold for square enix ### Input: CREATE TABLE table_31537 (
    "Place" real,
    "Title" text,
    "Platform" text,
    "Publisher" text,
    "Units sold" real
) ### Response: SELECT AVG("Units sold") FROM table_31537 WHERE "Publisher" = 'square enix'