twenty years later , e.t. is still a cinematic touchstone . 
(ROOT (S (ADVP (NP (CD twenty) (NNS years)) (RBR later)) (, ,) (NP (NNP e.t.)) (VP (VBZ is) (ADVP (RB still)) (NP (DT a) (JJ cinematic) (NN touchstone))) (. .)))
(ROOT (S (ADVP (NP (CD ) (NNS )) (RBR )) (, ) (NP (NNP )) (VP (VBZ ) (ADVP (RB )) (NP (DT ) (JJ ) (NN ))) (. )))