holds up well after two decades 
(ROOT (S (VP (VBZ holds) (PRT (RP up)) (ADVP (RB well)) (PP (IN after) (NP (CD two) (NNS decades))))))
(ROOT (S (VP (VBZ ) (PRT (RP )) (ADVP (RB )) (PP (IN ) (NP (CD ) (NNS ))))))