Table: premier_league_iceland_players
Columns: season
player
position
nationality
team

Question: What Nationality has the Player of Marcus Walker?
SQL: SELECT "nationality" FROM premier_league_iceland_players WHERE "player" = 'marcus walker'

Question: What Season is listed for the Player of Jon Stefansson?
SQL: SELECT "season" FROM premier_league_iceland_players WHERE "player" = 'jon stefansson'

Question: Which Team has the Player of A.J. Moye?
SQL: SELECT "team" FROM premier_league_iceland_players WHERE "player" = 'a.j. moye'

Question: What Position does the Team of KR and the Player of Marcus Walker have listed?
SQL: SELECT "position" FROM premier_league_iceland_players WHERE "team" = 'kr' AND "player" = 'marcus walker'