What is the IHSAA class for the school in 10 Clark county with mascot of the Mustangs?
CREATE TABLE table_name_73 (
    ihsaa_class VARCHAR,
    county VARCHAR,
    mascot VARCHAR
)
SELECT ihsaa_class FROM table_name_73 WHERE county = "10 clark" AND mascot = "mustangs"
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: What is the IHSAA class for the school in 10 Clark county with mascot of the Mustangs? ### Input: CREATE TABLE table_name_73 (
    ihsaa_class VARCHAR,
    county VARCHAR,
    mascot VARCHAR
) ### Response: SELECT ihsaa_class FROM table_name_73 WHERE county = "10 clark" AND mascot = "mustangs"