CREATE TABLE table_204_974 (id DECIMAL, "season" DECIMAL, "level" TEXT, "division" TEXT, "section" TEXT, "administration" TEXT, "position" TEXT, "movements" TEXT)

which was the only kolmonen whose movements were promoted ?
SELECT "season" FROM table_204_974 WHERE "movements" = 'promoted'
SELECT "season" FROM "table_204_974" WHERE "movements" = 'promoted'