collapses under its own meager weight . 
(ROOT (S (VP (VBZ collapses) (PP (IN under) (NP (PRP$ its) (JJ own) (JJ meager) (NN weight)))) (. .)))
(ROOT (S (VP (VBZ ) (PP (IN ) (NP (PRP$ ) (JJ ) (JJ ) (NN )))) (. )))