( ( ( The role ) ( of ( ( an organism ) ( in ( ( nutrient and ) energy ) ) ) ) ) ( ( flow ( within ( ( an ecosystem ) ( -LRB- ( ( ( e.g. , ) ( herbivore ( , ( carnivore ( , decomposer ) ) ) ) ) -RRB- ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN role)) (PP (IN of) (NP (NP (DT an) (NN organism)) (PP (IN in) (NP (NN nutrient) (CC and) (NN energy)))))) (VP (VBP flow) (PP (IN within) (NP (NP (DT an) (NN ecosystem)) (PRN (-LRB- -LRB-) (NP (NNP e.g.)) (, ,) (NP (NN herbivore) (, ,) (NN carnivore) (, ,) (NN decomposer)) (-RRB- -RRB-))))) (. .)))
The role of an organism in nutrient and energy flow within an ecosystem (e.g., herbivore, carnivore, decomposer).
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN carnivore)) (VP (VBZ is) (PP (IN at) (NP (NP (DT the) (NN top)) (PP (IN of) (NP (DT the) (NN energy) (NN pyramid)))))) (. .)))