How many nationalities/sponsors for mirror/type schmidt uv?
CREATE TABLE table_23851574_2 (
    nationality_sponsors VARCHAR,
    mirror_type VARCHAR
)
SELECT COUNT(nationality_sponsors) FROM table_23851574_2 WHERE mirror_type = "Schmidt UV"
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: How many nationalities/sponsors for mirror/type schmidt uv? ### Input: CREATE TABLE table_23851574_2 (
    nationality_sponsors VARCHAR,
    mirror_type VARCHAR
) ### Response: SELECT COUNT(nationality_sponsors) FROM table_23851574_2 WHERE mirror_type = "Schmidt UV"