what is the year union university was founded?
CREATE TABLE table_1715730_2 (
    founded VARCHAR,
    institution VARCHAR
)
SELECT founded FROM table_1715730_2 WHERE institution = "Union University"
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 year union university was founded? ### Input: CREATE TABLE table_1715730_2 (
    founded VARCHAR,
    institution VARCHAR
) ### Response: SELECT founded FROM table_1715730_2 WHERE institution = "Union University"