Tell me the average launced for capacity mln tpa of 15,0
CREATE TABLE table_31583 (
    "Name" text,
    "Location" text,
    "Launched" real,
    "Acquired" text,
    "Capacity, mln tpa" text
)
SELECT AVG("Launched") FROM table_31583 WHERE "Capacity, mln tpa" = '15,0'
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 launced for capacity mln tpa of 15,0 ### Input: CREATE TABLE table_31583 (
    "Name" text,
    "Location" text,
    "Launched" real,
    "Acquired" text,
    "Capacity, mln tpa" text
) ### Response: SELECT AVG("Launched") FROM table_31583 WHERE "Capacity, mln tpa" = '15,0'