( ( Decomposers ( such ( as ( worms ( , ( mushrooms ( , ( ( flies and ) maggots ) ) ) ) ) ) ) ) ( ( ( break down ) ( dead ( ( plants and ) animals ) ) ) . ) )
(ROOT (S (NP (NP (NNS Decomposers)) (PP (JJ such) (IN as) (NP (NNS worms) (, ,) (NNS mushrooms) (, ,) (NNS flies) (CC and) (NNS maggots)))) (VP (VBP break) (PRT (RP down)) (NP (JJ dead) (NNS plants) (CC and) (NNS animals))) (. .)))
Decomposers such as worms, mushrooms, flies and maggots break down dead plants and animals.
(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)))) (. .)))