What is the only type of university that was founded in 1873?
CREATE TABLE table_2318 (
    "School" text,
    "Location(s)" text,
    "Control" text,
    "Type" text,
    "Enrollment" real,
    "Founded" real
)
SELECT "Control" FROM table_2318 WHERE "Founded" = '1873'
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 only type of university that was founded in 1873? ### Input: CREATE TABLE table_2318 (
    "School" text,
    "Location(s)" text,
    "Control" text,
    "Type" text,
    "Enrollment" real,
    "Founded" real
) ### Response: SELECT "Control" FROM table_2318 WHERE "Founded" = '1873'