CREATE TABLE table_name_17 (gagarin_cup_winner VARCHAR2, gagarin_cup_finalist VARCHAR2)

Who is the gagarin cup winner when avangard omsk is the gagarin cup finalist?
SELECT gagarin_cup_winner FROM table_name_17 WHERE gagarin_cup_finalist = "avangard omsk"
SELECT "gagarin_cup_winner" FROM "table_name_17" WHERE "avangard omsk" = "gagarin_cup_finalist"