( ( Some animals ) ( are ( ( carnivores , ) ( which ( means ( that ( they ( eat ( only meat ) ) ) ) ) ) ) ) )
(ROOT (S (NP (DT Some) (NNS animals)) (VP (VBP are) (NP (NP (NNS carnivores)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ means) (SBAR (IN that) (S (NP (PRP they)) (VP (VBP eat) (NP (JJ only) (NN meat))))))))))))
Some animals are carnivores, which means that they eat only meat
(ROOT (S (NP (NNP Carnivore)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN for) (NP (NP (DT a) (NN heterotroph)) (SBAR (WHNP (WDT that)) (S (VP (VBZ eats) (NP (UCP (ADVP (RB only)) (CC or) (ADJP (RB mainly) (JJ animal))) (NNS foods))))))))) (. .)))