( ( For example ) ( , ( ( in ( ( drier ecosystems ) ( around ( ( the world ) ( where ( there ( ( is not ) ( enough ( moisture ( to ( help ( in ( ( the decay ) ( of ( dead plants ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ( , ( fire ( ( is ( required ( to ( ( ( break down ) and ) ( help ( recycle ( the nutrients ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (PP (IN in) (NP (NP (NN drier) (NNS ecosystems)) (PP (IN around) (NP (NP (DT the) (NN world)) (SBAR (WHADVP (WRB where)) (S (NP (EX there)) (VP (VBZ is) (RB not) (ADJP (RB enough) (JJ moisture) (S (VP (TO to) (VP (VB help) (PP (IN in) (NP (NP (DT the) (NN decay)) (PP (IN of) (NP (JJ dead) (NNS plants)))))))))))))))) (, ,) (NP (NN fire)) (VP (VBZ is) (VP (VBN required) (S (VP (TO to) (VP (VP (VB break) (PRT (RP down))) (CC and) (VP (VB help) (VP (VB recycle) (NP (DT the) (NNS nutrients))))))))) (. .)))
For example, in drier ecosystems around the world where there is not enough moisture to help in the decay of dead plants, fire is required to break down and help recycle the nutrients.
(ROOT (S (NP (NP (DT A) (NN role)) (PP (IN of) (NP (NP (NNS mushrooms)) (PP (IN in) (NP (NNS ecosystems)))))) (VP (VBZ is) (VP (VBG breaking) (PRT (RP down)) (NP (JJ dead) (NN plant) (NN material)))) (. .)))