CREATE TABLE table_203_288 (id DECIMAL, "season" TEXT, "premiere date" TEXT, "the winner" TEXT, "runner-up" TEXT, "finalists" TEXT, "contestants in order of elimination" TEXT, "number of contestants" TEXT, "number of concerts" DECIMAL)

what is the last season that ton won ?
SELECT "season" FROM table_203_288 WHERE "the winner" = 'ton' ORDER BY "premiere date" DESC LIMIT 1
SELECT "season" FROM "table_203_288" WHERE "the winner" = 'ton' ORDER BY "premiere date" DESC NULLS LAST LIMIT 1