CREATE TABLE table_36907 ("Club" CLOB, "Sport" CLOB, "Founded" FLOAT, "League" CLOB, "Venue" CLOB, "Head Coach" CLOB)

Sport of football, and a Venue of stadion polonii is what league?
SELECT "League" FROM table_36907 WHERE "Sport" = 'football' AND "Venue" = 'stadion polonii'
SELECT "League" FROM "table_36907" WHERE "Sport" = 'football' AND "Venue" = 'stadion polonii'