CREATE TABLE table_10747 ("Date" TEXT, "Name" TEXT, "Flag" TEXT, "Tonnage  ( GRT ) " FLOAT, "Sunk by" TEXT)

What is the flag for Terkoeli?
SELECT "Flag" FROM table_10747 WHERE "Name" = 'terkoeli'
SELECT "Flag" FROM "table_10747" WHERE "Name" = 'terkoeli'