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