CREATE TABLE table_203_646 (id DECIMAL, "year" DECIMAL, "competition" TEXT, "venue" TEXT, "position" TEXT, "notes" TEXT)

following the world championships in seville , what was the next venue for the world championships ?
SELECT "venue" FROM table_203_646 WHERE "competition" = 'world championships' AND "year" > (SELECT "year" FROM table_203_646 WHERE "competition" = 'world championships' AND "venue" = 'seville') ORDER BY "year" LIMIT 1
SELECT "venue" FROM "table_203_646" WHERE "competition" = 'world championships' AND "year" > (SELECT "year" FROM "table_203_646" WHERE "competition" = 'world championships' AND "venue" = 'seville') ORDER BY "year" NULLS FIRST LIMIT 1