( Summarize ( ( the ( one ( general concept ) ) ) ( ( illustrated ( by ( ( ( ( ( ( ( -LRB- ( a -RRB- ) ) ( ( a numbers ) pyramid ) ) , ) ( ( -LRB- ( b -RRB- ) ) ( ( a biomass ) pyramid ) ) ) , ) and ) ( ( -LRB- ( c -RRB- ) ) ( ( an energy ) pyramid ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Summarize)) (NP (DT the) (CD one) (JJ general) (NN concept)) (VP (VBD illustrated) (SBAR (IN by) (S (S (LST (-LRB- -LRB-) (DT a) (-RRB- -RRB-)) (NP (DT a) (NNS numbers)) (VP (VBZ pyramid))) (, ,) (S (LST (-LRB- -LRB-) (NN b) (-RRB- -RRB-)) (NP (DT a) (NNS biomass)) (VP (VBZ pyramid))) (, ,) (CC and) (S (LST (-LRB- -LRB-) (NN c) (-RRB- -RRB-)) (NP (DT an) (NN energy)) (VP (VBZ pyramid)))))) (. .)))
Summarize the one general concept illustrated by (a) a numbers pyramid, (b) a biomass pyramid, and (c) an energy pyramid.
(ROOT (S (NP (NNP Ecological) (NNS pyramids)) (VP (MD can) (VP (VB demonstrate) (NP (NP (DT the) (NN decrease)) (PP (IN in) (NP (NN energy) (, ,) (NNS biomass) (CC or) (NNS numbers)))) (PP (IN within) (NP (DT an) (NN ecosystem))))) (. .)))