Table: nba_sportsmanship_award
Columns: season
player
position
nationality
team

Question: What positions are in the Chicago bulls?
SQL: SELECT "position" FROM nba_sportsmanship_award WHERE "team" = 'chicago bulls'

Question: What season did a United States center play in?
SQL: SELECT "season" FROM nba_sportsmanship_award WHERE "nationality" = 'united states' AND "position" = 'center'