Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_23851574_2 (nationality_sponsors VARCHAR, mirror_type VARCHAR)
### Question:
How many nationalities/sponsors for mirror/type schmidt uv?
### Answer:
SELECT COUNT(nationality_sponsors) FROM table_23851574_2 WHERE mirror_type = "Schmidt UV"