( ( ( heterotrophs -- ) ( organisms ( that ( must ( ( ( obtain ( their food ) ) ( by ( eating ( other organisms ) ) ) ) ( -LRB- ( ( ( living or ) dead ) -RRB- ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NNS heterotrophs)) (: --) (NP (NP (NNS organisms)) (SBAR (WHNP (WDT that)) (S (VP (MD must) (VP (VB obtain) (NP (PRP$ their) (NN food)) (PP (IN by) (S (VP (VBG eating) (NP (JJ other) (NNS organisms))))) (PRN (-LRB- -LRB-) (ADJP (JJ living) (CC or) (JJ dead)) (-RRB- -RRB-))))))) (. .)))
heterotrophs -- organisms that must obtain their food by eating other organisms (living or dead).
(ROOT (S (NP (NP (NNS Organisms)) (ADJP (JJ incapable) (PP (IN of) (NP (NP (NN photosynthesis)) (SBAR (WHNP (WDT that)) (S (VP (MD must) (ADVP (RB therefore)) (VP (VB obtain) (NP (NN energy) (CC and) (NN carbon)) (PP (IN from) (NP (NN food))) (PP (IN by) (S (VP (VBG consuming) (NP (JJ other) (NNS organisms))))))))))))) (VP (VBP are) (VP (VBN called) (NP (NNS heterotrophs)))) (. .)))