of fun , with an undeniable energy 
(ROOT (PP (PP (IN of) (NP (NN fun))) (, ,) (PP (IN with) (NP (DT an) (JJ undeniable) (NN energy)))))
(ROOT (PP (PP (IN ) (NP (NN ))) (, ) (PP (IN ) (NP (DT ) (JJ ) (NN )))))