succumbs to gravity and plummets to earth 
(ROOT (VP (VP (VBZ succumbs) (PP (IN to) (NP (NN gravity)))) (CC and) (VP (VBZ plummets) (PP (IN to) (NP (NN earth))))))
(ROOT (VP (VP (VBZ ) (PP (IN ) (NP (NN )))) (CC ) (VP (VBZ ) (PP (IN ) (NP (NN ))))))