CREATE TABLE table_203_778 (id DECIMAL, "representative" TEXT, "title" TEXT, "presentation\ of credentials" TEXT, "termination\ of mission" TEXT, "appointed by" TEXT)

who was the last representative picked ?
SELECT "representative" FROM table_203_778 ORDER BY "presentation\nof credentials" DESC LIMIT 1
SELECT "representative" FROM "table_203_778" ORDER BY "presentation\nof credentials" DESC NULLS LAST LIMIT 1