stands for milder is n't better . 
(ROOT (S (S (VP (VBZ stands) (PP (IN for) (ADJP (JJR milder))))) (VP (VBZ is) (RB n't) (ADJP (JJR better))) (. .)))
(ROOT (S (S (VP (VBZ ) (PP (IN ) (ADJP (JJR ))))) (VP (VBZ ) (RB ) (ADJP (JJR ))) (. )))