Which average Opened has a Manufacturer of vekoma?
CREATE TABLE table_37576 (
    "Name" text,
    "Style" text,
    "Opened" real,
    "Manufacturer" text,
    "Themed Area" text
)
SELECT AVG("Opened") FROM table_37576 WHERE "Manufacturer" = 'vekoma'
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: Which average Opened has a Manufacturer of vekoma? ### Input: CREATE TABLE table_37576 (
    "Name" text,
    "Style" text,
    "Opened" real,
    "Manufacturer" text,
    "Themed Area" text
) ### Response: SELECT AVG("Opened") FROM table_37576 WHERE "Manufacturer" = 'vekoma'