CREATE TABLE table_204_622 (id DECIMAL, "year" DECIMAL, "competition" TEXT, "venue" TEXT, "position" TEXT, "event" TEXT, "notes" TEXT)

in what city did piotr 's last 1st place finish occur ?
SELECT "venue" FROM table_204_622 WHERE "position" = 1 ORDER BY "year" DESC LIMIT 1
SELECT "venue" FROM "table_204_622" WHERE "position" = 1 ORDER BY "year" DESC NULLS LAST LIMIT 1