Which institution's nickname is the Polar Bears?
CREATE TABLE table_28401 (
    "Institution" text,
    "Location" text,
    "Nickname" text,
    "Founded" real,
    "Founding Religious Affiliation" text,
    "Enrollment" real,
    "Joined" real
)
SELECT "Institution" FROM table_28401 WHERE "Nickname" = 'Polar Bears'
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: Which institution's nickname is the Polar Bears? ### Input: CREATE TABLE table_28401 (
    "Institution" text,
    "Location" text,
    "Nickname" text,
    "Founded" real,
    "Founding Religious Affiliation" text,
    "Enrollment" real,
    "Joined" real
) ### Response: SELECT "Institution" FROM table_28401 WHERE "Nickname" = 'Polar Bears'