CREATE TABLE table_204_353 (id DECIMAL, "no." DECIMAL, "date/time" TEXT, "aircraft" TEXT, "foe" TEXT, "result" TEXT, "location" TEXT, "notes" TEXT)

are there any other aircraft listed besides the nieuport 17 ?
SELECT "aircraft" FROM table_204_353 WHERE "aircraft" <> 'nieuport 17'
SELECT "aircraft" FROM "table_204_353" WHERE "aircraft" <> 'nieuport 17'