Question: Name the player name with matches of 51
SQL: SELECT "Player name" FROM "2-12321870-32" WHERE "Matches" = '51';

Question: Name the position for Brazil 2008 with goals of 0 1
SQL: SELECT "Position" FROM "2-12321870-32" WHERE "Country" = 'Brazil' AND "Period" = '2008' AND "Goals" = '0 1';

Question: Name the goals with matches of 21
SQL: SELECT "Goals" FROM "2-12321870-32" WHERE "Matches" = '21';

Question: Name the period with matches of 0 0 of Portugal
SQL: SELECT "Period" FROM "2-12321870-32" WHERE "Matches" = '0 0' AND "Country" = 'Portugal';