CREATE TABLE table_47633 ("Opponent" TEXT, "Res." TEXT, "Class" TEXT, "Score" TEXT, "Date" TEXT, "Competition" TEXT, "Notes" TEXT)

WHAT COMPETITION HAS MARIAN SANDU?
SELECT "Competition" FROM table_47633 WHERE "Res." = 'marian sandu'
SELECT "Competition" FROM "table_47633" WHERE "Res." = 'marian sandu'