fights a good fight on behalf of the world 's endangered reefs 
(ROOT (S (VP (VBZ fights) (NP (DT a) (JJ good) (NN fight)) (PP (IN on) (NP (NP (NN behalf)) (PP (IN of) (NP (NP (DT the) (NN world) (POS 's)) (JJ endangered) (NNS reefs))))))))
(ROOT (S (VP (VBZ ) (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NP (NN )) (PP (IN ) (NP (NP (DT ) (NN ) (POS )) (JJ ) (NNS ))))))))