( E ( is ( a ( noble gas ) ) ) )
(ROOT (S (NP (NNP E)) (VP (VBZ is) (NP (DT a) (JJ noble) (NN gas)))))
E is a noble gas
(ROOT (S (NP (NNP Neon)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (JJ noble) (NN gas))))) (. .)))