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

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