( ( Secondary consumers ) ( ( ( ( are carnivores ) , ) ( meaning ( they ( ( get energy ) ( by ( eating ( only ( herbivore animals ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Secondary) (NNS consumers)) (VP (VBP are) (NP (NNS carnivores)) (, ,) (S (VP (VBG meaning) (S (NP (PRP they)) (VP (VB get) (NP (NN energy)) (PP (IN by) (S (VP (VBG eating) (NP (RB only) (JJ herbivore) (NNS animals)))))))))) (. .)))
Secondary consumers are carnivores, meaning they get energy by eating only herbivore animals.
(ROOT (S (NP (NNS Herbivores)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (NNS animals)) (SBAR (WHNP (WDT that)) (S (VP (VBP eat) (S (NP (NNS producers)) (VP (TO to) (VP (VB get) (NP (NN energy)))))))))))) (. .)))