CREATE TABLE table_33638 ("Player" TEXT, "Nationality" TEXT, "Position" TEXT, "From" TEXT, "School/Country" TEXT)

What is the nationality of the forward/center who started playing in 1951?
SELECT "Nationality" FROM table_33638 WHERE "Position" = 'forward/center' AND "From" = '1951'
SELECT "Nationality" FROM "table_33638" WHERE "From" = '1951' AND "Position" = 'forward/center'