Which average Opened has a Manufacturer of vekoma?
CREATE TABLE table_name_19 (
    opened INTEGER,
    manufacturer VARCHAR
)
SELECT AVG(opened) FROM table_name_19 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_name_19 (
    opened INTEGER,
    manufacturer VARCHAR
) ### Response: SELECT AVG(opened) FROM table_name_19 WHERE manufacturer = "vekoma"