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

### Instruction:
Who is the gagarin cup winner when avangard omsk is the gagarin cup finalist?

### Inputs:
table_name: table, columns: ['Season', 'Duration', 'Gagarin Cup Winner', 'Gagarin Cup finalist', 'Continental Cup Winner', 'Top scorer']

### Response:
SELECT Gagarin Cup Winner FROM table WHERE Gagarin Cup finalist = avangard omsk