's a pity that ( nelson 's ) achievement does n't match his ambition 
(ROOT (VP (VBZ 's) (NP (NP (DT a) (NN pity)) (SBAR (WDT that) (S (-LRB- -LRB-) (NP (NNP nelson) (POS 's)) (-RRB- -RRB-) (NN achievement) (VP (VBZ does) (RB n't) (VP (VB match) (NP (PRP$ his) (NN ambition)))))))))
(ROOT (VP (VBZ ) (NP (NP (DT ) (NN )) (SBAR (WDT ) (S (-LRB- ) (NP (NNP ) (POS )) (-RRB- ) (NN ) (VP (VBZ ) (RB ) (VP (VB ) (NP (PRP$ ) (NN )))))))))