Question: Which college/junior/club teams nationality is canada and nhl team is minnesota north stars
Schema: create table table_1213511_7 (college_junior_club_team varchar, nationality varchar, nhl_team varchar, PRIMARY KEY (college_junior_club_team))
SQL: select college_junior_club_team from table_1213511_7 where nationality = "canada" and nhl_team = "minnesota north stars"