CREATE TABLE table_47588 ("Round" FLOAT, "Pick" FLOAT, "Player" TEXT, "Nationality" TEXT, "College" TEXT)

For the draft pick from round 3 out of Mercer College what is the nationality?
SELECT "Nationality" FROM table_47588 WHERE "Round" = '3' AND "College" = 'mercer'
SELECT "Nationality" FROM "table_47588" WHERE "College" = 'mercer' AND "Round" = '3'