( ( ( ( Carnivores , ) ( on ( the ( other hand ) ) ) ) , ) ( ( are ( those ( that ( eat ( only ( other animals ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Carnivores)) (, ,) (PP (IN on) (NP (DT the) (JJ other) (NN hand))) (, ,)) (VP (VBP are) (NP (NP (DT those)) (SBAR (WHNP (WDT that)) (S (VP (VBP eat) (NP (RB only) (JJ other) (NNS animals))))))) (. .)))
Carnivores, on the other hand, are those that eat only other animals.
(ROOT (S (NP (NNS Carnivores)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (NP (NNS heterotrophs)) (SBAR (WHNP (WDT that)) (S (VP (VBP eat) (ADVP (RB only)))))) (CC or) (NP (RB mainly) (NNS animals)))))) (. .)))