(S (S (BASENP (DT The) (NN advert)) (VP (VP (VBD was) (VP (VBN meant) (S (VP (TO to) (VP (VB be) (VP (VBN shown) (ADVP (RB only) (RB once)))))))) (CC but) (VP (VBD was) (VP (VBN turned) (PP (IN into) (BASENP (DT a) (NN campaign))))))) (PERIOD .))