worked five years ago but has since lost its fizz 
(ROOT (S (VP (VBD worked) (PP (NP (CD five) (NNS years)) (RB ago))) (CC but) (VP (VBZ has) (ADVP (RB since)) (VP (VBN lost) (NP (PRP$ its) (NN fizz))))))
(ROOT (S (VP (VBD ) (PP (NP (CD ) (NNS )) (RB ))) (CC ) (VP (VBZ ) (ADVP (RB )) (VP (VBN ) (NP (PRP$ ) (NN ))))))