where value world rank is 12, what is the quantity world rank?
CREATE TABLE table_21109892_1 (
    quantity_world_rank VARCHAR,
    value_world_rank VARCHAR
)
SELECT quantity_world_rank FROM table_21109892_1 WHERE value_world_rank = "12"
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: where value world rank is 12, what is the quantity world rank? ### Input: CREATE TABLE table_21109892_1 (
    quantity_world_rank VARCHAR,
    value_world_rank VARCHAR
) ### Response: SELECT quantity_world_rank FROM table_21109892_1 WHERE value_world_rank = "12"