CREATE TABLE table_17471 ("Year" FLOAT, "Division" CLOB, "League" CLOB, "Regular Season" CLOB, "Playoffs" CLOB, "Open Cup" CLOB)

For which league is the open cup the quarter finals
SELECT "League" FROM table_17471 WHERE "Open Cup" = 'Quarter Finals'
SELECT "League" FROM "table_17471" WHERE "Open Cup" = 'Quarter Finals'