For which league is the open cup the quarter finals
CREATE TABLE table_17471 (
    "Year" real,
    "Division" text,
    "League" text,
    "Regular Season" text,
    "Playoffs" text,
    "Open Cup" text
)
SELECT "League" FROM table_17471 WHERE "Open Cup" = 'Quarter Finals'
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: For which league is the open cup the quarter finals ### Input: CREATE TABLE table_17471 (
    "Year" real,
    "Division" text,
    "League" text,
    "Regular Season" text,
    "Playoffs" text,
    "Open Cup" text
) ### Response: SELECT "League" FROM table_17471 WHERE "Open Cup" = 'Quarter Finals'