Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_20 (league VARCHAR, sport VARCHAR, venue VARCHAR)
### Question:
Sport of football, and a Venue of stadion polonii is what league?
### Answer:
SELECT league FROM table_name_20 WHERE sport = "football" AND venue = "stadion polonii"