( ( Pyramid ( of Energy ) ) ( in Ecology ) )
(ROOT (NP (NP (NP (NN Pyramid)) (PP (IN of) (NP (NNP Energy)))) (PP (IN in) (NP (NNP Ecology)))))
Pyramid of Energy in Ecology
(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))))) (. .)))