nothing happens , and it happens to flat characters 
(ROOT (S (S (NP (NN nothing)) (VP (VBZ happens))) (, ,) (CC and) (S (NP (PRP it)) (VP (VBZ happens) (PP (IN to) (NP (JJ flat) (NNS characters)))))))
(ROOT (S (S (NP (NN )) (VP (VBZ ))) (, ) (CC ) (S (NP (PRP )) (VP (VBZ ) (PP (IN ) (NP (JJ ) (NNS )))))))