Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Sport of football, and a Venue of stadion polonii is what league?

### Inputs:
table_name: table, columns: ['Club', 'Sport', 'Founded', 'League', 'Venue', 'Head Coach']

### Response:
SELECT League FROM table WHERE Sport = football AND Venue = stadion polonii