CREATE TABLE table_204_498 (id DECIMAL, "location" TEXT, "building" TEXT, "year" DECIMAL, "km" DECIMAL, "monument" DECIMAL)

which location has more total km , kelsterbach or stadion ?
SELECT "location" FROM table_204_498 WHERE "location" IN ('kelsterbach', 'stadion') GROUP BY "location" ORDER BY SUM("km") DESC LIMIT 1
SELECT "location" FROM "table_204_498" WHERE "location" IN ('kelsterbach', 'stadion') GROUP BY "location" ORDER BY SUM("km") DESC NULLS LAST LIMIT 1