CREATE TABLE table_name_51 (nhl_team VARCHAR2, college_junior_club_team VARCHAR2)

The Estevan Bruins (WCHL) are affiliated with what NHL team?
SELECT nhl_team FROM table_name_51 WHERE college_junior_club_team = "estevan bruins (wchl)"
SELECT "nhl_team" FROM "table_name_51" WHERE "college_junior_club_team" = "estevan bruins (wchl)"