( ( Carnivores ( that ( eat ( herbivores ( ( ( occupy ( the ( third ( trophic level ) ) ) ) and ) are ) ) ) ) ) ( ( called ( secondary consumers ) ) . ) )
(ROOT (S (NP (NP (NNS Carnivores)) (SBAR (WHNP (WDT that)) (S (VP (VBP eat) (S (NP (NNS herbivores)) (VP (VP (VB occupy) (NP (DT the) (JJ third) (JJ trophic) (NN level))) (CC and) (VP (VBP are)))))))) (VP (VBD called) (NP (JJ secondary) (NNS consumers))) (. .)))
Carnivores that eat herbivores occupy the third trophic level and are called secondary consumers.
(ROOT (S (NP (NP (JJ Secondary) (NNS consumers)) (PRN (-LRB- -LRB-) (SBAR (WHNP (WDT which)) (S (VP (VBP eat) (NP (JJ primary) (NNS consumers))))) (-RRB- -RRB-))) (VP (VBP are) (VP (VBN considered) (S (VP (TO to) (VP (VB be) (ADJP (JJ trophic) (NP (NN level) (CD 3)))))))) (. .)))