What year did the the school with the nickname eagles join the mac?
CREATE TABLE table_28397 (
    "Institution" text,
    "Location" text,
    "Nickname" text,
    "Founded" real,
    "Type" text,
    "Enrollment" real,
    "Joined MAC" real
)
SELECT MIN("Joined MAC") FROM table_28397 WHERE "Nickname" = 'Eagles'
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 year did the the school with the nickname eagles join the mac? ### Input: CREATE TABLE table_28397 (
    "Institution" text,
    "Location" text,
    "Nickname" text,
    "Founded" real,
    "Type" text,
    "Enrollment" real,
    "Joined MAC" real
) ### Response: SELECT MIN("Joined MAC") FROM table_28397 WHERE "Nickname" = 'Eagles'